Westinghouse WBRC 140 Series, Installation, Start-Up, Maintenance, Parts, Warranty

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whl-648 Rev. 001 Rel. 003 Date 10.8.19
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Table of Contents
Part 1 - General Safety Information 5
A. Operation and Installation Warnings 5
B. Improper Combustion 6
C. Gas 6
D. When Servicing the Boiler 7
E. Boiler System 7
F. Water Chemistry Requirements 7
G. Freeze Protection 7
H. Water Temperature Adjustment and Scalding 8
I. High Elevation Installations 8
Part 2 - Before You Start 9
A. What’s in the Box 9
B. Optional Equipment 9
Part 3 - Prepare the Boiler Installation 10
A. Locating the Boiler 10
B. Leveling 10
C. Clearances for Service Access 10
D. Residential Garage and Closet Installations 11
E. Exhaust Vent and Intake Pipe 11
1. Direct Vent of Exhaust and Intake 12
2. Power Venting, Indoor Combustion Air in Confined or Unconfined
Space 12
F. Carbon Monoxide Detectors 12
G. Prevent Combustion Air Contamination 12
H. Removing a Appliance from a Common Vent System 13
I. Technical Specifications 14
J. Wall-Mounting (Wall Mount Models Only) 17
K. Flow Restrictor 18
Part 4 - Water Piping 19
A. General Plumbing Guidelines 19
B. Backflow Preventer 20
C. Expansion Tank 20
NOTICE
IMPORTANT
In accordance with Section 325 (f) (3) of the Energy Policy and
Conservation Act, Westinghouse has provided this boiler with
multiple features designed to save energy by reducing the
boiler water temperature as heating load decreases.
These features include:
• A modulating combustion system that adjusts firing rate
based on heat demand.
• Adjustment of boiler set point based on inferred heat load
as determined by an outdoor sensor. The outdoor sensor
is supplied by Westinghouse with this boiler.
• This boiler does not include a standing pilot.
• This boiler is designed and shipped to assure the highest
efficiency operation possible. Such high efficiency is
achieved by limiting heating circuit water temperature to
140°F when there is no anticipated heat load, based upon
the outdoor sensor and the Outdoor Reset Curve (sensor
response curve) in the boiler software.
• This feature may be over-ridden as described below in
specific installations:
• The boiler control is equipped with an outdoor sensor
override for use with building management systems or in
cascaded systems (for systems with total input of 300,000
BTU/hr or greater).
See statement below for an important notice on the use of the
override.
IMPORTANT
In accordance with Section 325 (f) (3) of the Energy Policy and
Conservation Act, this boiler is equipped with a feature that
saves energy by reducing the boiler water temperature as the
heating load decreases. This feature is equipped with an override
which is provided primarily to permit the use of an external
energy management system that serves the same function. THIS
OVERRIDE MUST NOT BE USED UNLESS AT LEAST ONE OF THE
FOLLOWING CONDITIONS IS TRUE:
• An external energy management system is installed that
reduces the boiler water temperature as the heating load
decreases.
• This boiler is not used for space heating.
• This boiler is part of a modular or multiple boiler system
having a total input of 300,000 BTU/hr or greater.
• This boiler is equipped with a tankless coil.
The CSD-1 ASME Code, Section CW-400 requires that hot water
heating and supply boilers have a) a UL 353 temperature control
device, b) at least one (1) temperature-actuated control to shut
off the fuel supply when system water reaches a preset operating
temperature, c) a high temperature limit control that prevents
the water temperature from exceeding the maximum allowable
temperature by causing a safety shutdown and lockout, and d) its
own sensing element and operating switch.
The temperature control system integrated into the 926 control
provided with this heating boiler complies with the requirements
of CSD-1 Section CW-400 as a temperature operation control. The
control monitors the temperature difference between the inlet
and the outlet sensor, which is affected by boiler water flow. If this
temperature difference exceeds 55°F (typically because of low water
flow or very low heat load), the control will reduce the maximum fan
speed. If the temperature difference exceeds 60°F, the control will
effectively sense there is little or no water flow or heat load and shut
the boiler down. The controller will restart automatically once the
temperature difference has dropped below 55°F and the minimum
off time (anti-cycle time) has expired. In addition, if the control senses
that the outlet water temperature has reached 210°F, the boiler is put
into a hard lockout and requires manual reset to restart.
WARNING
!
Protection From Damage
1. Boilers generating a glow, spark or flame capable of igniting
flammable vapors may be installed in a garage, provided the
pilots, burners or heating elements and switches are at least
eighteen (18) inches (457 mm) above the floor level.
2. Where such boilers installed within a garage are enclosed in a
separate, approved compartment having access only from outside
of the garage, such boilers may be installed at floor level provided
the required combustion air is also taken from the exterior of the
garage. Fuel burning boilers having sealed combustion chambers
need not be elevated.
3. All boilers installed in areas where they may be subjected
to mechanical damage shall be suitably guarded against such
damage by being installed behind adequate barriers or by being
elevated or located out of the normal path of a vehicle using any
such garage.
4. In seismic zones 3 and 4, boilers shall be anchored or strapped
to resist horizontal displacement due to earthquake motion.
Strapping shall be at points within the upper one-third (1/3)
and lower one-third (1/3) of its vertical dimensions. At the lower
point, a minimum distance of four (4) inches (102 mm) shall be
maintained above the controls with the strapping.
5. An boiler supported from the ground shall rest on level concrete
or other approved base extending not less than three (3) inches
(76 mm) above the adjoining ground level.
6. Any boiler should be installed in such a manner that if it should
leak the resulting flow of water will not cause damage to the area
in which it is installed. If the boiler is installed in a location where
a leak could cause damage, it is required to provide containment
measures.