Weil-McLain CG-4 - Page 8

BYPASS PIPING
BYPASS PIPING IS NOT NORMALLY REQUIRED ON TYP¬
ICAL BASEBOARD SYSTEM.
Bypass piping should be used for the following installations.
Bypass, supply, and return piping should be same size.
1. Tb protect:
• radiant panels, plaster, etc. from high temperature
water supplied from boiler, or
• boiler from condensation caused by low temperature
water returned from system.
USE WITH REFRIGERATION SYSTEM
Boiler must be installed so that chilled medium is piped in
parallel with heating boiler using appropriate valves to pre¬
vent chilled medium from entering boiler. Consult I = B = R
Installation and Piping Guides.
If boiler is connected to heating coils located in air handling
units where they can be exposed to refrigerated air, gravity
circulation during cooling cycle must be prevented with flow
control valves or other automatic means.
RECOMMENDED PIPING FOR COMBINATION
HEATING & COOLING (REFRIGERATION) SYSTEMS
FIGURE 8
FIGURE 6
2. To protect boiler from condensation formed by low water
temperature returned from large water content converted
gravity systems, etc., see Figure 7.
TO SYSTEM
FROM
SYSTEM
8