Product manual

14 McQuay IM 782-4
Installation Guidelines
10 Use float and thermostatic or bucket traps with low
pressure steam. On high pressure steam, use bucket
traps. Use thermostatic traps only for air venting.
11 Use bucket traps only with on/off control.
12 Locate traps at least 12 inches below the coil return
connection.
13 Do not use modulating steam valves on high pressure
systems.
14 Size modulating valves properly. Do not undersize.
15 Destiny steam coils are not recommended for freezing
conditions or entering temperatures below 35°F (1.6°C).
Figure 16: Steam Coil Connections (Type SS)
Water Heating Coils
Heating coil connection guidelines are listed below. Refer to
Figures 13 and 14.
1 Water supply and water return connections extend
through the end panel of the coil section. All connections
are labeled on the end panel.
2 Water supply and water return connections are copper
sweat on units 002 through 010 and male NPT iron pipe
on units 015 through 030.
3 When installing couplings, do not apply undue stress to
the connection extending through unit panel. Use a
backup pipe wrench to avoid breaking the weld between
coil connection and header.
4 Follow recommendations of the control manufacturer
regarding types, sizes, and installation of controls.
5 Hot water coils are not recommended for use with
entering air below 40°F.
6 If fresh air and return air are to be heated by a hot water
coil, take care in the design of the system to provide
thorough mixing before air enters the coil.
Figure 17: Water Heating Coil Connections
Figure 18: Piping Arrangements
One and Two Row Coil
with Spayed Headers
Vacuum breaker
1/2" check valve
Steam main
Return main
12" min.