9
WATER PIPING
C. SYSTEM PIPING
1. The WBV/WV Plastic Jacket boiler is recommended
to be piped with the return line in the rear. The
return can be moved to the front of the boiler by
moving the plug from the front return port to the
rear. The necessary componets for a front return are
included with the boiler.
2. Figure 3.3 shows the recommended piping for the
WBV/WV™ boiler.
3. The DHW zone is piped from the primary loop in
parallel with the central heating (CH) zones. It should
be piped as close to the boiler as possible since it
should be the hottest zone.
D. FREEZE PROTECTION
Glycol for hydronic applications is specially formulated
for heating systems. It includes inhibitors which prevent
the glycol from attacking metallic system components.
Make sure that the system fluid is checked for correct
glycol concentration and inhibitor level.
E. SPECIAL APPLICATIONS
1. If the WBV/WV™ boiler is used in conjunction with a
chilled medium system, pipe the chiller in a separate
secondary loop as shown in Figure 3.6.
2. If using the WBV/WV™ with a hot water coil in a
forced air system, be sure the hot water coil is
downstream of the cooling coil in the airstream.
F.
TANKLESS HEATER OR COVERPLATE
1. If a tankless coil is used (item 9), install as pictured.
On water boilers, install in opening in front section.
2. If not using a tankless coil, cover the heater opening
with cover plate (item 7 or 16).
G. CONTROLS
1. Water Boiler Controls:
a. For installations subject to UL726, a second
operating control that senses water temperature
is also required (not provided). Use an L4080B
or equivalent. Install in the supply piping near
the boiler.
2. For complete information on servicing and
adjustment of controls, refer to the attached control
specification sheets.
Figure 3.4: Recommended Near Boiler Piping for
Rear Return
Figure 3.5: Optional Near Boiler Piping for Front
Return
DANGER
Install anti-scald device in hot water supply piping.
Water temperature above 125°F can cause severe
burns instantly or death from scalds.
X1019R and X1020R coils installed in WBV™ boilers
have internal flow controls installed. Do not use
external flow controls with these coils.
NOTICE
Be sure rubber gasket is in place between cover
plate or water heater plate and boiler section.
NOTICE
Pipe the discharge of the safety valve or relief valve
to prevent injury in the event of pressure relief. Pipe
the discharge to a drain. Provide piping that is the
same size as the relief valve.
CAUTION
