Energy Master HHPM SERIES, Инструкции по установке, эксплуатации, техническому обслуживанию и ремонту

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Manual Heat Pump Model HHPM-V.2- SEP 2012
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once it starts. This allows oil to circulate properly, compressor windings to cool. Expansion Valve to
modulate, etc. The minimum Differential setting to produce 10 minutes of running time is a function of
heating capacity and storage tank volume. Following table shows the required minimum setting for single
heat pump installation of various storage tank size.
Table 4. Minimum tank temperature differential temperature setting for single heat pump
Hot Water Storage Tank size (litre)
500 600 700 800 900 1000 1100 1200
Differential temp. setting (
o
C) 7.5 6 5.5 4.5 4 3.7 3.3 3
3.8 Ducting
Heat Pump Unit is provided with double width, double inlet, forward curved, centrifugal fan,
capable of delivering cold air.
When ductwork is connected to convey by-product cooled air from heat pump unit to the required
area, ductwork shall be designed at 1 Pascal/metre friction loss ( 0.12 in.wc./ 100 ft) and duct transition
shall be gradually expanded to the duct with 0.6 metre transition duct length . The external static pressure
shall be 37 Pascal (0.15 in.wc.), which is equivalent to the 38 m. duct distance. For longer distance duct,
fan speed and motor rating may be changed. Contact Energy Master Co., Ltd. or representative for further
information.
Air delivery is essential for heat pump unit, to maintain the heat input at the evaporator and the
unit’s performance. The cooled air destination shall be well ventilated, no restriction that will reduce the
cooled air flow rate from the heat pump.
Insulation of duct systems is important for two reasons:
a) To minimize heat gain to the cool air coming from the heat pump.
b) To prevent moisture from condensing on the exterior of duct surfaces.
Generally, 25.4 mm thick fiberglass insulation with a good vapor Barrier is adequate. A vapor
barrier such as metal foil, PVC, or a metal sheath on the exterior of the insulation is important to prevent the
insulation from becoming water soaked when duct runs pass through warm, humid spaces.