Cabinet Unit Heaters

From a performance and mounting perspective there is no issue using a ceiling unit on the wall or vice versa. There are two differences that need to be kept in mind when doing this.

First is that wall units come with access doors and have optional unit mounted thermostats available, ceiling units do not. This is due to the fact that most ceiling units are not accessible and thermostats are remote mounted.

Second is ceiling units come with hinged front panels equipped with safety chains. This restricts the front panel from coming away from the unit and requires the operator to disconnect the safety latch before the panel will fully open. The wall unit does not come with these features. Kits can be purchased to install these items in the field should they be required.

While it is strongly suggested that any unit with a unit mounted thermostat utilize a remote temperature sensor it is not included with the unit or the thermostat price. This is due to the fact that many installations do not use them or do not want them. Adding them to the base price and forcing their use could put the units at a competitive price disadvantage. Sensors are available as a ship loose option as standard.

If factory mounted temperature sensors are required please contact the factory for availability and pricing.

Units have louvered or open/ducted inlets and outlets as standard, with bar grill or double deflection grilles as options. However we can provide units with perforated inlets and outlets for security applications. In these cases airflow may be restricted, so out inlet and outlet sizes will need to be adjusted to account for the additional restriction.

Should the need arise to change the coil handing in the field the unit can be adjusted. Since the unit has end pockets on either side the water and electrical connections can be flipped.

The electrical components will need to be removed first. Then the fan deck removed and then the coil. Re-insert the coil in the new position; be sure to cover the original knockouts for the coil on the end panel. Once the coil is back in place re-install the fan deck, locate the electrical components in the new electrical end pocket and rewire. Take care when removing all components.

Yes, the wall seal is a kit that shipped loose for field installation. This includes locating the flanges at the required depth. The unit can be recessed from 2” – 10”.

If a wall mounted or ceiling mounted unit is ordered as exposed but needs to be recessed you can order a trim kit. This will allow you to apply the unit in a recessed application. In the case where the inlet or outlet are in the top or bottom panels you will need to order new cabinet pieces to accommodate the new airflow pattern as well. This will mean field disassembly and reassembly of the cabinet. Contact the factory for pricing.

Floor units cannot typically be recessed as there is no standard wall seal kit and the outlet is usually in the top panel. However a custom wall seal kit and a front outlet would allow for the unit to be recessed. Slope top units cannot be recessed.

There are applications with some floor units where the back side of the unit maybe visible. While the unit is designed for attachment to the wall, even with the floor units a painted back panel can be provided. These panels will cover the entire back and be one solid color. This will require additional mounting through the leg base to ensure stability of the install.

Standard fasteners are slot head on access doors and Allen head on front panels. Access doors have an option to be upgraded to Allen head and both the doors and fronts can be upgraded to a Torx fastener with center pin for limiting access. If more secure access is required either or both fasteners can up changed to key lock. For access doors one or both doors can be upgraded and for fronts one to three fasteners can be upgraded, depending on the unit. There is a charge per fastener, contact the factory for more details.

Cabinets are typically made from cold rolled steel and finish in one of our six standard powder coat finishes or the standard Zehnder Rittling prime coat. However we can make them from alternate materials or custom color:

Stainless Steel

• Unpainted 304-4B finish is typical, though alternate finishes are available (polish/mirror finish not recommended).
• For the price add see Custom pricing page in the price book. Comments should be added to the order denoting what items are to be stainless.
• Custom lead times apply.
• Entire cabinet and wall seal kit must be stainless as all cabinet pieces are visible when installed and in contact with each other.
• Use stainless steel in applications where aluminum enclosures are requested.

Galvanized Steel

• Unpainted for field finish. 18, 16, 14 gauge available.
• Price and lead time add, must be quoted by Zehnder Rittling.
• Custom lead times apply

Custom Color

• Zehnder Rittling is able to match existing or special colors. Color chip must be provided for match (manufactures part number alone is not recommended due to potential variations in charts/chips). Chips are typically not returned and may be cut for match by the vendor. Finished goods should not be sent for paint match.
• Price and lead time match, see Custom pricing sheet. Price is dependent on total amount of units at time of order.
• Orders can be placed for standard product with custom color selections by choosing the required product and adding a comment to the order referencing the color. Customer service will make the necessary adjustments to the order.
• Chips should be sent to Zehnder Rittling customer service immediately to reduce lead time/delays.
• Two processes are available for custom color orders, depending on required approval, that will affect lead time. If the chip is provided for match only the order can be entered and released once the chip is received by Zehnder Rittling.
• If color match approval is required once the chip is provided it will be sent to our vendor for match. Chips will then be sent out to you for approval. Once the color is approved the order can be released for production.
• Metallic matches are not available. However we are able to provide two metallic colors, Silversmith and Bright Argent. These are the only two approved metallic colors.
• Contact customer service for samples.

In cases where the standard offering of thermostatic controls does not meet the needs of the project we can provide any number of custom options. From programmable thermostats to additional control components, such as air or current sensors, we have experience with a wide range of controls.

Provide the details of the custom control request and we can provide a price or an alternative. If a specific controls component or manufacturer is requested that detail should be included, with the relevant cut sheet and part number.

In extreme cases of custom controls the specification can be provided for Zehnder Rittling to review.

Another available option is for factory mounting of customer supplied DDC controls. This option is available as a standard. It requires a cut sheet and wiring diagram provided, as well as a completed customer supplied parts information sheet.

Please contact applications engineering for more details.

While most basic valve package applications are covered by our standard offering, it is not all inclusive. There are plenty of configurations or alternate component packages that can be thought up. So for those situations we are able to offer custom valve packages.

There are many alternatives available when it comes to custom valve packages, starting with modifying our own available packages to suit a need, either by adding in or removing a standard component. We can source an alternative part to meet a specification or by brand name.

We can accept customer supplied items.

We can add in items we do not offer as standard.

All of these options will require review to determine availability and options. The request should be forwarded to applications engineering for further details.

Valve packages as standard are factory assembled and shipped loose for field install. They are not factory installed on the coils due to the possibility of damage due to shipping and handling during install of the unit. Factory mounted valve packages can be provided as a custom, with additional supports provided to minimize potential damage, but additional care must be taken during installation. Additional charges will apply.

An alternate solution is to order the units with factory mounted unions. This will minimize the site install and remove the risk of additional damage. This is a standard option available through the configurator.

If the need arises for replacement parts the simplest way to handle this request is to provide the unit serial number to customer service along with the part(s) request. This will allow them to ensure that the correct part for your unit is available or provide you with an alternate. If the serial number is not available you will be provided with a quote for the current version of the item requested.

Once customer service has the information they will provide you with a quote for the item, including price and availability