Pre-Delivery/Install Checklist

whl-648 Rev. 001 Rel. 000 Date 4.11.19
19
Figure 8 - Water Pressure vs. Flow through the Restrictors - 140 Models
Figure 9 - Water Pressure vs. Flow through the Restrictors - 199 Models
Part 4 - Water Piping
WARNING
!
Failure to follow the instructions in this section WILL VOID the
warranty and may result in property damage, severe personal
injury, or death.
CAUTION
Do not apply a torch within 12” of the boiler. If sweat connections
are used, sweat tubing to the adapter before tting adapter to
the water connections on the boiler. Damages due to improper
installation practices ARE NOT covered by warranty.
Dielectric unions or galvanized steel ttings must not be used in a
system with this boiler. Doing so WILL VOID the warranty. Use only
copper, brass, or stainless steel ttings. Teon thread sealant must
be used on all connections.
A. General Plumbing Guidelines
CAUTION
Use two wrenches when tightening water piping at the boiler. Use
one wrench to prevent the boiler return or supply line from turning.
Failure to prevent piping connections from turning could cause
damage to boiler components.
The boiler control module uses temperature sensors to provide
both high limit protection and modulating temperature control. The
control module also provides low water protection by sensing the
water level in the heat exchanger. Some codes / jurisdictions may
require additional external controls.
The water connections must be installed in accordance with all local
and national plumbing codes, or any applicable standard which
prevails.