Instructions / Assembly
-3-
Pre-Installation
• THIS PRODUCT MUST BE INSTALLED AND MAINTAINED BY
A LICENSED PROFESSIONAL PLUMBER, ELECTRICIAN, AS
APPLICABLE. IN ADDITION TO THE INSTRUCTIONS IN THIS
MANUAL, FOLLOW ALL APPLICABLE LOCAL AND STATE
CODES INCLUDING MA CMR 248 OR IN THE ABSENCE OF SUCH
CODES, THE CURRENT EDITIONS OF THE NATIONAL PLUMBING
CODE AND THE NATIONAL ELECTRIC CODE.
• DRIP PAN AND DRAIN: This appliance should not be installed in
an area where leakage of the tank or connections can result in
damage to the area adjacent to the appliance or to lower floors of
the structure. When such locations cannot be avoided, a suitable
drain pan, adequately drained and kept clear, must be installed
under the appliance.
• CAUTION: Determine whether your water is corrosive or acidic,
and that there are no suspended solids, toxic or other substances
or abnormally high chlorine levels in the water that could damage
or affect the water heater or the rest of your plumbing system.
• Wiring Options. Select either a Non-Priority or Priority System:
Two options are available when wiring the controls of the water heater
in the space heating system (boiler and distribution elements).
1. Non-Priority System - The controls of the water heater must be wired
as a separate heating zone with a standard zone valve or a separate
circulator dedicated to the water heater “zone”.
NOTICE: In this non-priority option, the water heater will be supplied
just as another zone. This means that if all space heating zones call for
hot boiler water at the same time, the water heater may not be supplied
with enough hot boiler water to “recover” adequately. The delivery of
domestic hot water will be diminished. In many, but not all cases,
this is not a problem because the routine oversizing of boiler output is
adequate for both loads.
2. Priority System - Under this wiring option the water heater will be
supplied before space heating.
In limited circumstances, space heating can
be lost in the home in this priority mode. Any
demand for space heating is postponed until the water heater has
reached its set temperature. This delay in supplying the space
heating zones is usually not noticed by the inhabitants of the
living spaces. However, in the event of certain malfunctions such
as circulator or thermostat failure, space heating could be delayed
indefinitely. If undetected and uncorrected, freezing damage to
piping could result.
• Select Circulator versus Zone Valve
The flow of hot boiler water to the water heater can be controlled with
either a motorized zone valve or a circulator.
1. Separate circulator. The recommended way to provide adequate
flow through the water heater heat exchanger is to use a separate
dedicated circulator. This option may be used even though the heating
system utilizes zone valves.
2. Zone valve. If a zone valve is to be used, a flow rate of 3 to 5 gpm with
all zones in use is required. A full-port zone valve should be used.
• All installations require a low-water cut-off or automatic fill valve on your
boiler system to reduce the risk of boiler water loss.
• Steam boiler installations require a low-water cut-off which is also
required by most codes.
• Installation of a vacuum breaker is required to prevent damage to the
water heater when drained. There must be no valves installed between
the vacuum breaker and water heater.
PLEASE READ THE FOLLOWING INSTRUCTIONS CAREFULLY
IMPORTANT GENERAL SAFETY INFORMATION -
ADDITIONAL SPECIFIC SAFETY ALERTS APPEAR IN THE FOLLOWING INSTRUCTIONS.
MODEL CIRCULATOR ZONE VALVE*
SHUTOFF
VALVE
VACUUM
BREAKER
RELIEF
VALVE
THERMAL EXPANSION
TANK
DRAIN
WH SERIES
4 GPM
@ 6 FT
3/4” Full Port or
1” STD
4 1 Included 41 Gal. Models: 2 Gal. Included
CH SERIES
4 GPM
@ 6 FT
3/4” Full Port or
1” STD
4 1 Included
41 Gal. Models: 2 Gal.
80 Gal. Models: 4.4 Gal.
Included
*IF CIRCULATOR IS NOT USED.
ALL INSTALLATIONS REQUIRE AN ADEQUATE AMOUNT OF TEFLON
®
SEALING TAPE OR PIPE DOPE FOR THREADED JOINTS.
Required Components
15
20
10
5
0
0 2 4 6 8
Pressure Drop (Ft)
Flow (GPM)
Heat Exchanger Pressure Drop
Use this chart to select the proper circulator for your BOILERMATE
®
.