2. PRE-INSTALLATION CHECKLIST
IMPORTANT STEPS AND DECISIONS REQUIRED BEFORE INSTALLATION
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1. TABLE OF CONTENTS
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THIS PRODUCT MUST BE INSTALLED AND MAINTAINED
BY A LICENSED PROFESSIONAL. IN ADDITION TO THE
INSTRUCTIONS IN THIS MANUAL, FOLLOW ALL
APPLICABLE LOCAL AND STATE CODES OR IN THE
ABSENCE OF SUCH CODES, THE CURRENT EDITIONS OF
THE NATIONAL PLUMBING CODE AND THE NATIONAL
ELECTRIC CODE.
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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.
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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.
USE GLYCOL ONLY WITH DOUBLE-
WALLED HEAT EXCHANGER
MODELS. Glycol is a poisonous substance. To avoid
seepage or leakage of glycol to surfaces where humans or
animals can ingest it, use glycol only in double-walled
units, so that any leaks will most likely be released to the
atmosphere. However, a leak to a surface area may still
occur, so any use of glycol must be monitored closely and
humans and animals should be protected from contact
with the unit.
Do not connect the water heater
domestic supply with baseboard or
other space heating units or elements. Any contaminants
in the baseboard units will contaminate the potable water
in the water heater and also adversely affect its
performance.
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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.
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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 with a minimum
flow rate of 5 gpm. This option may be used even though
the heating system utilizes zone valves.
2.
Zone valve
(system flow of 4-8 gpm). If a zone valve is to
be used, a minimum flow rate of 5 gpm with all zones in
use is required. A full-port zone valve should be used.
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All installations require a low-water cut-off or automatic fill valve
on your boiler system to reduce the risk of boiler water loss.
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Steam boiler installations require a low-water cut-off which is
also required by most codes.
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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.
2. Pre-Installation Checklist...............................................
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3. Required Components and Accessories Checklist.......
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4. ZPG - Series Piping Installation ....................................
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5. ZPGLP -Series Piping Installation .................................
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6. ZPG - Series Wiring.......................................................
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7. ZPGLP - Series Wiring ................................................
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8. Startup Procedure .......................................................
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9. Troubleshooting ...........................................................
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10. Replacement Parts ......................................................
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11. General Safety Information..........................................
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12. Product Warranty.........................................................
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