Carrier 50PSW036-360 specifications Operation, Units with Aquazone Complete C Control, System Test

Table 8 — Approximate Fluid Volume (L)

per 30 M of Pipe

PIPE	DIAMETER (in.) [mm]		VOLUME (gal.) [L]
Copper	1	[25.4]	4.1	[15.5]
	1.25 [31.8]		6.4	[24.2]
	1.5 [38.1]		9.2	[34.8]
Rubber Hose	1	[25.4]	3.9	[14.8]
Polyethylene	3/4 IPS SDR11		2.8	[10.6]
	1	IPS SDR11	4.5	[17.0]
	11/4 IPS SDR11		8.0	[30.8]
	1/2 IPS SDR11		10.9	[41.3]
	2	IPS SDR11	18.0	[68.1]
	11/4 IPS SCH40		8.3	[31.4]
	11/2 IPS SCH40		10.9	[41.3]
	2	IPS SCH40	17.0	[64.4]

LEGEND

IPS — Internal Pipe Size

SCH — Schedule

SDR — Standard Dimensional Ratio

NOTE: Volume of heat exchanger is approximately 1.0 gallon (3.78 liters).

Table 9 — Antifreeze Percentages by Volume

	MINIMUM TEMPERATURE FOR FREEZE
ANTIFREEZE		PROTECTION (C)
	–12.2	–9.4	–6.7	–3.9
Methanol (%)	25	21	16	10
100% USP Food Grade	38	30	22	15
Propylene Glycol (%)
Ethanol (%)	29	25	20	14

Cooling Tower/Boiler Systems — These systems typically use a common loop maintained at 15.6 to 32.2 C. The use of a closed circuit evaporative cooling tower with a second- ary heat exchanger between the tower and the water loop is rec- ommended. If an open type cooling tower is used continuously, chemical treatment and filtering will be necessary.

Ground Coupled, Closed Loop and Plateframe Heat Exchanger Well Systems — These systems al- low water temperatures from –1.1 to 43.3 C. The external loop field is divided up into 51 mm polyethylene supply and return lines. Each line has valves connected in such a way that upon system start-up, each line can be isolated for flushing using only the system pumps. Air separation should be located in the pip- ing system prior to the fluid re-entering the loop field.

OPERATION

Power Up Mode — The unit will not operate until all the inputs, terminals and safety controls are checked for normal operation.

NOTE: The compressor will have a 5-minute anti-short cycle upon power up.

Units with Aquazone™ Complete C Control

NOTE: On all subsequent compressor calls the random start delay is omitted.

HEATING STAGE 2 — To enter Stage 2 mode, terminal W is active (Y is already active). Also, the G terminal must be active or the W terminal is disregarded.

Units with Aquazone Deluxe D Control

STANDBY — The compressor will be off. The reversing valve (RV) relays will be on if inputs are present.

HEATING STAGE 1 — In Heating Stage 1 mode, the fan en- able and compressor relays are turned on immediately. Once the demand is removed, the relays are turned off and the con- trol reverts to standby mode. If there is a master/slave or dual compressor application, all compressor relays and related func- tions will operate per their associated DIP switch 2 setting on S1.

HEATING STAGE 2 — In Heating Stage 2 mode, the com- pressor relays remain on. The control reverts to Heating Stage 1 mode once demand is removed. If there is a master/slave or dual compressor application, all compressor relays and related functions will operate per their associated DIP switch 2 setting on S1.

COOLING STAGE 1 — In Cooling Stage 1 mode, the com- pressor and RV relays are turned on immediately. If configured as stage 2 (DIP switch set to OFF) then the compressor and fan will not turn on until there is a stage 2 demand. The compressor relays are turned off immediately when the Cooling Stage 1 de- mand is removed. The control reverts to standby mode. The RV relay remains on until there is a heating demand. If there is a master/slave or dual compressor application, all compressor relays and related functions will track with their associated DIP switch 2 on S1.

COOLING STAGE 2 — In Cooling Stage 2 mode, the com- pressor and RV relays remain on. The control reverts to Cool- ing Stage 1 mode once the demand is removed. If there is a master/slave or dual compressor application, all compressor re- lays and related functions will track with their associated DIP switch 2 on S1.

NIGHT LOW LIMIT (NLL) STAGED HEATING — In NLL staged heating mode, the override (OVR) input becomes active and is recognized as a call for heating and the control will immediately go into a Heating Stage 1 mode. With an additional 30 minutes of NLL demand, the control will go into Heating Stage 2 mode. With another additional 30 minutes of NLL demand, the control will go into Heating Stage 3 mode.

SYSTEM TEST

System testing provides the ability to check the control operation. The control enters a 20-minute Test mode by mo- mentarily shorting the test pins. All time delays are increased 15 times. See Fig. 11.

STANDBY — The Y and W terminals are not active in Stand- by mode, however the O and G terminals may be active, de- pending on the application. The compressor will be off.

COOLING — The Y and O terminals are active in Cooling mode. After power up, the first call to the compressor will initi- ate a 5 to 80 second random start delay and a 5-minute anti- short cycle protection time delay. After both delays are com- plete, the compressor is energized.

NOTE: On all subsequent compressor calls the random start delay is omitted.

BR BRG	CCG	CC
C	Off	On
Test
R
JW3	FP1

TEST

MODE

CPINS

R

HEATING STAGE 1 — Terminal Y is active in heating Stage 1. After power up, the first call to the compressor will initiate a 5 to 80 second random start delay and a 5-minute anti- short cycle protection time delay. After both delays are complete, the compressor is energized.

Fig. 11 — Test Mode Pins Location

Test Mode — Enter the Test mode on Complete C or Deluxe D controls by momentarily shorting the test terminals. The Complete C or Deluxe D control will enter a 20-minute test mode period in which all time delays are sped up 15 times.

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