Cli-mate CLI-AP30 Especificações descarregar pdf (Página 79)

Problem

Cause

Solution

Poor Solar Heating

Contribution (Compared

to previous output at

same time of year)

Increased hot water demand

• Check if hot water demand has increased, which would

reduce the % contribution from solar even with the same

level of output

Poor Solar Heating

Contribution (Compared

to previous output at

same time of year)

Insufficient flow rate

• Check flow gauge for proper flow rate, check pump

operation if flow rate insufficient

• Adjust restrictor screw on flow meter

• Check heat transfer fluid pH, color and viscosity, may

need to be flushed and replaced.

Poor Solar Heating

Contribution (Compared

to previous output at

same time of year)

Partial shading of collector

• Check collector location for shading or snow build up. If

snow buildup, ensure bottom of collector is raised off

roof, and angle of install is at least 45

Poor Solar Heating

Contribution (Compared

to previous output at

same time of year)

Heat loss from pipes

• Check that insulation is still in good condition with no

exposed hot piping

Poor Solar Heating

Contribution (Compared

to previous output at

same time of year)

Damage to evacuated tubes

• Check that evacuated tubes are all intact and the

bottom is still silver

Poor Solar Heating

Contribution (Compared

to previous output at

same time of year)

Heat pipes not operating

• Check that heat pipes are making good contact in

header, and are hot at the tip

Poor Solar Heating

Contribution (Compared

to previous output at

same time of year)

Scale build up in brazed plate HE

(if BPHE used)

• Flush sediment from tank

• Back flush BPHE with vinegar (or equivalent)

• Install sieve and clean out valve before pump on BPHE

loop.

Poor Solar Contribution

(Compared to expected

levels)

Thermo-siphoning

• System may be reverse thermo-siphoning at night.

Ensure check valve after or in pump is working. May

need to install heat trap (downward U shaped pipe) on

return line close to tank.

Poor Solar Contribution

(Compared to expected

levels)

Insufficient pump run time

• For normal ON/OFF pump operation (not variable

speed) ensure the pump is running long enough for the

heat from the collector to return to tank - feel return line

with hand (careful) to check. Reduce dTMin value

slightly.

Poor Solar Contribution

(Compared to expected

levels)

Pump cycling too long and

dissipating heat

• dTMin value set too low, especially if closed loop

system (applies to ON/OFF or variable speed)

• T2 sensor too low in tank, always reading cold water.

Move to correct location.

Poor Solar Contribution

(Compared to expected

levels)

Excessive tank heat losses

• Insulate both the hot and cold water pipes connected to

the storage tank. A check valve (spring not flap) on the

cold and hot pipe close to the tank will help reduce heat

migration up the pipe.

• Insulate any exposed fittings and valves on the storage

tank. DO NOT impair the operation of the PTRV.

Not enough hot water

IF ELECTRIC

Electric not heating water

• Check operation and power supply to element

• Replace element if necessary

• Check controller boost settings

Not enough hot water

IF BOILER or GAS TANKLESS

Booster not heating water

• Check gas/fuel supply

• Check operation of boiler/heater

• Check controller boost settings

Not enough hot water

Faulty tempering valve

• Check operation of tempering valve

Not enough hot water

Increased hot water demand

• Install larger capacity boiler/booster

• Revise boost settings of controller

• Install larger storage tank

Intermittent short

batches of cold water

when showering

Faulty tempering valve

• Check operation of tempering valve

Intermittent short

batches of cold water

when showering

Faulty tankless gas booster

operation (if post gas system)

• Check operation of tankless gas booster

Apricus Solar Collector Installation & Operation Manual - USA

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