Amtrol TD-7ZDW - Manual (Page 4)

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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: To avoid leaking and/or
property damage, install with a drip pan connected to
an adequate working drain kept clear at all times.
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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 BOILER
MATE™ or the rest of your plumbing system.
USE GLYCOL ONLY WITH DOUBLE-
WALLED HEAT EXCHANGER
MODELS. Glycol is a hazardous substance. To avoid
seepage or leakage of glycol to surfaces where children 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
children and animals should be protected from contact
with the unit.
Do not connect the BOILER MATE™
domestic supply with baseboard or
other space heating units or elements. Any contaminants
in the baseboard units will contaminate the potable water
in the BOILER MATE™ 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
BOILER MATE™ in the space heating system (boiler and
distribution elements).
1. Non-Priority System - The controls of the BOILER
MATE™ must be wired as a separate heating zone with
a standard zone valve or a separate circulator
dedicated to the BOILER MATE™ "zone".
NOTICE: In this non-priority option, the BOILER MATE™ 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
BOILER MATE™ 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
BOILER MATE™ 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 BOILER MATE™ 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 BOILER MATE™ can be
controlled with either a motorized zone valve or a
circulator.
1. Zone valve (system flow of 4-8 gpm). If a zone valve is to
be used, a minimum flow rate of 4 gpm with all zones in
use is required with a maximum of 8 gpm with only the
BOILER MATE™ in use. Be sure the zone valve chosen has
a maximum pressure drop (Cv = 4) when fully opened.
2. Separate circulator. The recommended way to provide
adequate flow through the BOILER MATE™ heat
exchanger is to use a separate dedicated circulator with a
minimum flow rate of 4 gpm (10 feet of head minimum) and
maximum flow rate of 8 gpm. This option may be used
even though the heating system utilizes zone valves.
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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 BOILER MATE™ when drained.
2. PRE-INSTALLATION CHECKLIST
IMPORTANT STEPS AND DECISIONS REQUIRED BEFORE INSTALLATION
Do not locate this product where
leaking and flooding could cause
damage to surrounding property.