Boumatic Dari-Kool III-120 Installation Instructions Manual Download

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1E-138B

Dari-Kool III-120 Instructions

- WARNING —————————–––——————––––

Important Instructions in accordance with American National

Standard Z21.22 for installing pressure and relief valves. Install

temperature and protection equipment required by local codes,

but not less than a combination temperature and pressure relief

valve certified as meeting the requirements for relief valves and

automatic gas shutoff devices for hot water supply systems, ANSI

Z21.22-1971 by a nationally recognized testing laboratory that

maintains periodic inspection of production of listed equipment

or materials. The valve must be oriented, provided with tubing, or

otherwise installed so that discharge can exit only within 6 inches

above, or at any distance below the structural floor, and cannot

contact any live electrical part.

Installation Note: TPR valve must be installed so that the sensing

element is within the top 6 inches of the tank.

Important Note: A temperature and pressure relief valve is for

protection against both excessive temperature and pressure; and

if either of these conditions develop in the system, the valve will

open and discharge water. ( label P/N 4016124)

1.2

Control Circuit

The control circuit consists of a manual-reset high-limit control

in series with two separate thermostats. One thermostat

controls the electric heating element. The other thermostat,

in conjunction with an optional valve, controls the water

temperature with respect to the refrigerant heat input. All of

the controls open on temperature rise.

1.3

Control Settings

The factory settings on the controls are as follows: Limit 210 °F

(98° C) (fixed), thermostat for electric eating element 160°F

(71°C), refrigerant thermostat 170°F (77° C). For minimum

energy consumption the electric heat thermostat should be set

for the lowest possible setting consistent with water temperature

requirements. The refrigerant thermostat should always be at

least 10°F (-12º C) higher, but not more than 170°F (77° C).

In order to minimize the danger of scalding, this setting should

be as low as possible, consistent with usage requirements.

1.4

Optional Water Valve

A water valve is available for controlling the water temperature

with respect to the reclaimed heat energy. The water valve is

used to remove excessive energy from the Dari-Kool III-120

to limit the water temperature. The valve is normally open, so

water will flow from the Dari-Kool III-120 when the valve is not

energized. When the water temperature rises to the thermostat set

point, hot water will be bled through the valve to dissipate more

energy than is being absorbed. The water temperature will drop

to the thermostat cut-in temperature, and then the valve will be

activated, stopping the flow. Only the amount of hot water equal

to the excess refrigerant energy will be bled off.

Choosing the Location for the Dari-

Kool-120

The location for the Dari-Kool III-120 should be chosen

carefully. The following guidelines must be observed.

1. The Dari-Kool III-120 should be in a clean dry place, as close

as possible to the compressor to minimize the refrigerant line

lengths.

2. It should be located with adequate clearance for ease of

installation and service.

3. It must be in an area that is protected from freezing.

4. It should be located where water would not damage the

surroundings or critical areas of the building if a fitting leaks.

If a pitched floor to an open drain is not available, a catch pan

should be constructed. See Figure 1.

5. It must not be located where flammable liquids are stored

or where combustible vapors might be ignited by the

arc drawn inside the thermostat when it cycles.

Installing the Dari-Kool III-120

Many localities have enacted regulations, ordinances, or codes

governing the installation of water heaters and heat reclaimers.

All local electrical, refrigeration, and plumbing codes must be

complied with and the installation must be accomplished only

by qualified personnel.

1. After the location has been determined, the Dari-Kool

III-120 should be moved into position and leveled. At this

time, reevaluate the working space allowed for making the

refrigeration connections and checking for refrigeration

leaks.

2. The cold water inlet is located at the bottom of the tank.

Provide a union, shut-off valve, and drain valve for this

connection. Refer to Figure 1 for typical arrangements.

3. The hot water outlet is at the top of the tank. A reducing

tee and a combination pressure/temperature relief valve are

furnished with the Dari-Kool III-120. These must be installed

so the sensing element extends inside the tank and the hot

water discharge is horizontal, as shown in Figure 2. Connect

the outlet of the relief valve to a suitable open drain. The

drain pipe must pitch downward from the valve and should

be no smaller than the size of the outlet valve. The end of

the drain line should be close to the floor with a 6” (152 mm)

air gap. It must not be concealed and should be protected

from freezing. No valve of any type may be installed between

the relief valve and the tank or in the drain line.

- CAUTION —————————–––——————–––––

Failure to properly install the discharge line from the safety relief

valve could result in hot water spraying on a person, causing

burns.