Amtrol TD-41ZDW, TD-7ZDW manual Pre-Installationchecklist

2. PRE-INSTALLATION CHECKLIST

IMPORTANT STEPS AND DECISIONS REQUIRED BEFORE INSTALLATION

j 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.

j 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.

j 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.

Do not locate this product where leaking and flooding could cause damage to surrounding property.

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.

j 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.

j 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.

j All installations require a low-water cut-off or automatic fill valve on your boiler system to reduce the risk of boiler water loss.

j Steam boiler installations require a low-water cut-off which is also required by most codes.

j Installation of a vacuum breaker is required to prevent damage to the BOILER MATE™ when drained.

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