“Flexi-Multi” Heat Pump Recommended Combinations continued... OUTDOOR CAT. NO. MFG. NO.

QUANTITY INDOOR CAT. NO. MFG. NO. 3 ea of 3 ea of

3H840A

*** 1 ea of *** 1 ea of *** 1 ea of 1 ea of 1 ea of 2 ea of

*** 2 ea of *** 2 ea of

3H840AX 3H841A 3H841A

3H841AX 3H841A

3H841AX 3H841A 3H842A

3H828AX

KMHS0972 and 1 ea of XMHS0972 and 1 ea of KMHS1272 and 1 ea of KMHS1272 and 1 ea of XMHS1272 and 1 ea of KMHS1272 and 1 ea of XMS1272

QUANTITY CAT. NO. MFG. NO. 3H839A 3H839A 3H842A

and 1 ea of

KMHS1272 and 1 ea of KMHS1872 XHS1872

*** Premised on all evaporators not calling simultaneously. Indicates evaporator load exceeds condenser capacity. If all evaporators call simultaneously, capacity will be reduced equally among all evaporators

3H828AX XHS1872 3H828AX XHS1872 3H843A 3H843A 3H840A

KMHS0772 KMHS0772 KMHS1872

KMHS2472 KMHS2472 KMHS0972

CHARGING A/C AND HEAT PUMP SYSTEMS

The charging procedures for A/C and heat pumps are essentially the same WHEN the system is operating IN THE COOLING MODE. Charging to the manufacturer’s recommend data as listed on the equipment is always the correct choice. Checking sub- cooling and superheat is always good practice. However, charging to a “beer can cold” suction line is not an acceptable method, nor is it good practice on today’s higher efficiency cooling equipment. Of the numerous possible charging methods in practice today, (by superheat, by sub cooling, by approach, by weight) the best method is to weigh in the charge based on the manufac- turer’s recommendation listed on the nameplate, making any adjustment required for the line set length.

When a heat pump needs be charged and it is operating in the HEATING MODE, the ONLY acceptable charging method is to weigh in the correct charge. This will require a calibrated charging cylinder, or an electronic charging meter, or an extremely ac- curate scale capable of measuring in ounces. Weighing in the charge according to the manufacturer’s recommendations, with line length adjustments is the only acceptable method in this operational mode.

Realizing the importance of proper charging, R.E.Michel carries both calibrated charging cylinders, and electronic charging scales for our customer’s convenience.

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AIR CONDITIONING & HEATING EQUIPMENT