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36| SAHP - Installation Manual
V3 June 2021US - SD667052
REPLACEMENT
OF PARTS continued
10.8 Charge with Refrigerant
(a)
Once the replacement heat pump has been successfully
vacuumed, proceed to charge the unit with the
appropriate volume of R134a / 513a refrigerant.
L®
/V >À}iÌ iÃÞÃÌiwÀÃÌiÃÕÀiÌ«>ViÌ i,£Î{>É
513a refrigerant bottle onto appropriate and accurate
weighing scales and zero the scales to allow you to
monitor accurately the quantity of refrigerant entering
the system. Ensure the refrigeration gauges and
connected lines have been purged with R134a / 513a
before use. Proceed to connect the refrigeration
charging line to the suction line service valve.
V®
Ƃ-Ƃ*ÀiµÕÀiÃÓ°ÈLÃvÀivÀ}iÀ>ÌÌLiV >À}i`
vÀ««iÜÀÃi«>À>Ì`ÃÌ>ViÃÕ«ÌÓÈ°Ó½LiÌÜii
the heat pump and evaporator. If the pipework
Ãi«>À>ÌÃ}Ài>ÌiÀÌ >ÓÈ°Ó½]>>``Ì>£°Èâ
«iÀÎvÌv,£Î{>Éx£Î>ÜLiÀiµÕÀi`Õ«Ì£Ó°nâ
additionally R134a / 513a – 3.4 Ibs maximum
refrigeration quantity within the system).
(d)
When charging, the differential in pressure between
the R134a / 513a bottle and SAHP refrigeration circuit
will facilitate the passive movement of refrigerant
into the SAHP. When passive movement ceases
to facilitate the entry of refrigerant, turn the unit on at
the fuse spur. The compressor will actuate after 1
minute, and will proceed to draw R134a / 513a
refrigerant from within the refrigerant bottle. Monitor
the weight of refrigerant carefully until the required
quantity of refrigerant has been transferred to the SAHP,
at which time close all refrigeration isolation valves.
(e)
Proceed to remove any connected refrigeration
equipment suitably and follow the commissioning
guidelines outlined within section 7 and section 13 of
this manual.
SECTION 11