Handleiding Bosch Compress 3000 - HP 200-1 E AI-F (pagina 12 van 40) (Engels)

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Installation instructions

Failing to install this accessory will void the tank

warranty.

3.4.3 Condensate Drain Tubes

This unit has a condensation tray. The water collected

in the tray drains out of the drain ports coming off the

back of the unit. Two flexible hoses are included with

this unit. It is important that both of these hoses are

attached to the two drain ports coming off the back of

the unit. The upper drain serves as an overflow drain

that will operate only if the bottom drain is blocked.

Water leaking from the upper drain is an indicator that

the lower drain, and possibly the condensate pan itself,

require cleaning.

B Attach one end of the longer 6’ hose to the lower

drain port on the back of the unit, underneath the rear

cover.

B Direct the other end to a drain in the floor or no higher

than 3’ above the floor.

If such drain is unavailable, a condensate drain pump

(not provided) must be purchased and installed.

B Attach the shorter 3” hose to the top drain port.

Fig. 9

3.4.4 T&P Valve

A combination temperature and pressure-relief valve,

complying with the Standard for Relief Valves for Hot

Water Supply Systems, ANSI Z21.22, is supplied and

must remain installed in the opening provided and

marked for the purpose on the water heater. No valve of

any type should be installed between the relief valve and

the tank. Local codes shall govern the installation of

relief valves.

Connect the outlet of the relief valve to a suitable open

drain so that the discharge water cannot contact live

electrical parts or persons and to eliminate potential

water damage. Under no circumstances should the

relief valve vent be connected to the condensate drain

line.

Piping used should be of a type approved for hot water

distribution. The discharge line must be no smaller than

the outlet of the valve and must pitch downward from

the valve to allow complete drainage (by gravity) of the

relief valve and discharge line. The end of the discharge

line should not be threaded or concealed and should be

protected from freezing. No valve of any type, restric-

tion, reducing coupling or tee should be installed in the

discharge line.

This valve must be marked with a maximum set pressure

not to exceed the marked maximum working pressure of

the water heater. It should be installed into an opening

provided and marked for this purpose in the water

heater, and vented so that any discharge from the valve

exits only within 6 inches above, or at any distance

below, the structural floor, and does not contact any live

electrical part. The discharge opening must not be

blocked or reduced in size under any circumstances.

3.4.5 Thermal expansion tank

Determine if a check valve exists in the inlet water

supply line. It may have been installed in the cold water

line as a separate backflow preventer, or it may be part

of a pressure-reducing valve, water meter or water

softener. A check valve located in the cold water inlet

line can cause what is referred to as a "closed water

system". A cold water inlet line with no check valve or

backflow prevention device is referred to as an "open"

water system.

As water is heated, it expands in volume and creates an

increase in the pressure within the water system. This

action is referred to as "thermal expansion". In an

"open" water system, expanding water which exceeds

the capacity of the water heater flows back into the city

main where the pressure is easily dissipated.

A "closed water system", however, prevents the

expanding water from flowing back into the main supply

line, and the result of "thermal expansion" can create a

rapid and dangerous pressure increase in the water

heater and system piping. This rapid pressure increase

can quickly reach the safety setting of the relief valve,

causing it to operate during each heating cycle. Thermal

expansion, and the resulting rapid and repeated

expansion and contraction of components in the water

heater and piping system, can cause premature failure

Warning: To reduce the risk of

excessive pressures and temperatures

in this water heater, install temperature

and pressure protective equipment

required by local codes and no less

than a combination temperature and

pressure relief valve certified by a

nationally recognized testing laboratory

that maintains periodic inspection of

production of listed equipment or

materials, as meeting the requirements

for Relief Valves for Hot Water Supply

Systems, ANSI Z21.22.

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