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Installation
Figure 28. Flue Assembly
Hot Water Heat Units (SLH_)
Hot water heating coils are factory installed inside the heater section of the unit. Once the unit is
set into place, the hot water piping and the factory provided three way modulating valve must be
installed. The valve can be installed inside the heat section or near the unit. If the valve is installed
in a remote location, use field supplied wiring to extend the control wires from the heater section
to the valve. Two access holes are provided in the unit base as illustrated in
Following the guidelines listed below will enhance both the installation and operation of the "wet
heat" system.
Figure 29
Table 20
Note: The valve actuators are not waterproof. Failure to protect the valve from moisture may
1. Support all field-installed piping independently from the heating coil.
2. Use swing joints or flexible connectors adjacent to the heating coil. (These devices will absorb
3. All return lines and fittings must be equal to the diameter of the "outlet" connection on the hot
4. Install a "Gate" type valve in the supply branch line as close as possible to the hot water main
5. Install a "Gate" type valve in the return branch line as close as possible to the return main and
6. Install a strainer in the hot water supply branch as shown in
62
and
Figure 31
illustrate the recommended piping configuration for the hot water coil.
lists the coil connection sizes.
result in the loss of heating control.
the strains of expansion and contraction).
water coil.
and upstream of any other device or takeoff.
down stream of any other device.
Figure 10, p.
Figure 29
and
Figure
38.
RT-SVX36G-EN
36.
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