Kees MUA TEMPERED MAKE-UP AIR UNITS - Heating & Cooling Coil I & M Manual - Manual (Page 5)

KEES, INC.
Products for Food Service & Sheet Metal Industry
400 S. INDUSTRIAL DRIVE - P.O. BOX L - ELKHART LAKE, WISCONSIN 53020 - (920) 876-3391 - FAX (920) 876-3065
Steam Coil Instructions
Application Recommendations:
Satisfactory operation and service life are best ensured when coils are installed with proper
piping, trap, and support arrangement. The following notes
are recommended for the coil unit
installation and operation.
General:
1. Provide separate supports and hangers for the unit and the piping.
2. Be certain that adequate piping flexibility is provided. Stresses resulting form expansion of
closely coupled piping and coil arrangement can cause serious damage.
3. Standard steam coils are pitched in the casings when installed for horizontal air flow. The
CASING MUST BE LEVEL after the unit is installed for proper condensate drainage. If
condensate is not removed the coil will suffer from water hammering and will have a
shortened life. On vertical air flow applications, the coils must be pitched when installed.
4. Do not reduce pipe size at the coil return connection. Carry return connection size through
the dirt pocket, making the reduction at the branch leading to the trap.
5. It is recommended that vacuum breakers be installed on all applications to prevent
retaining condensate in the coil. Generally, the vacuum breaker is to be connected between
the coil inlet and the return main. The vacuum breaker should be open to the atmosphere
and the trap design should allow venting of large quantities of air.
6. Do not drip supply mains through the coil.
7. Do not attempt to lift condensate when using modulating or on-off control.
8. Do not reduce the pipe size leaving the coil.
Traps:
1. Size traps in accordance with the manufacturer’s recommendations. Be certain that the
required pressure differential will always be available. DO NOT UNDERSIZE.
2. Float and thermostatic or bucket traps are recommended for low pressure steam. On high
pressure systems, bucket traps are normally recommended. The thermostatic traps should
be used only for air venting.