Carrier 50PCH specifications Unit Start-UpHeating Mode, Unit Start-Upwith WSHP Open Controls

Table 24 — 50PC048 Typical Unit Operating Pressures and Temperatures

ENTERING				COOLING							HEATING
WATER	WATER	Suction	Discharge	Super-	Sub-	Water	Air Temp	Suction		Discharge	Super-	Sub-	Water		Air Temp
	FLOW
TEMP		Pressure	Pressure	heat	cooling	Temp	Drop	Pressure		Pressure	heat	cooling	Temp		Rise
(F)	(GPM/ton)					Rise							Drop
		(psig)	(psig)	(F)	(F)	(F)	(F) DB	(psig)		(psig)	(F)	(F)	(F)		(F) DB
	1.5	119-129	190-210	15-20	10-15	19.3-21.3	18-26	63-	73	284-304	5-10	3-8	6.9-	8.9	17-25
30*	2.25	119-129	179-199	15-20	9-14	14.6-16.6	19-27	66-	76	288-308	6-10	3-8	5.0-	7.0	18-26
	3	119-129	158-178	15-20	9-14	9.8-11.8	19-27	69-	79	292-312	6-11	3-8	3.1-	5.1	18-26
	1.5	124-134	248-268	10-15	10-15	19.0-21.0	18-26	92-102		309-329	8-13	3-8	9.5-11.5		23-31
50	2.25	123-133	230-250	10-15	9-14	14.3-16.3	19-27	96-106		313-333	9-14	3-8	7.0-	9.0	24-32
	3	123-133	213-233	10-15	9-14	9.6-11.6	19-27	100-110		317-337	9-14	3-8	4.6-	6.6	24-32
	1.5	129-139	337-357	8-13	12-17	18.6-20.6	17-25	123-133		339-359	11-16	3-8	12.5-14.5		29-37
70	2.25	129-139	328-348	8-13	11-16	14.0-16.0	18-26	128-138		344-364	11-16	3-8	9.3-11.3		29-37
	3	129-139	300-320	8-13	11-16	9.4-11.4	18-26	133-143		350-370	12-17	3-8	6.2-	8.2	30-38
90	1.5	134-144	426-446	6-11	15-20	18.2-20.2	16-24	153-163		369-389	14-19	1-6	15.4-17.4		33-41
	2.25	134-144	406-426	6-11	15-20	13.7-15.7	17-25	160-170		376-396	15-20	1-6	11.6-13.6		35-43
	3	134-144	386-406	6-11	15-20	9.2-11.2	17-25	167-177		384-404	16-21	1-6	7.8-	9.8	36-44
110	1.5	140-150	560-580	4- 9	23-28	17.7-19.7	16-24	—		—	—	—	—		—
	2.25	140-150	536-556	4- 9	20-25	13.4-15.4	16-24	—		—	—	—	—		—
	3	139-149	511-531	4- 9	18-22	9.0-11.0	16-24	—		—	—	—	—		—

LEGEND

DB — Dry Bulb

—— No Heating Operation in This Temperature Range *Based on 15% Methanol antifreeze solution.

Table 25 — 50PC060 Typical Unit Operating Pressures and Temperatures

ENTERING				COOLING							HEATING
WATER	WATER	Suction	Discharge	Super-	Sub-	Water	Air Temp	Suction		Discharge	Super-	Sub-	Water		Air Temp
TEMP	FLOW					Temp							Temp
	(GPM/ton)	Pressure	Pressure	heat	cooling	Rise	Drop	Pressure		Pressure	heat	cooling	Drop		Rise
(F)		(psig)	(psig)	(F)	(F)		(F) DB	(psig)		(psig)	(F)	(F)			(F) DB
						(F)							(F)
30*	1.5	108-118	180-200	16-21	10-15	20.6	19-27	61- 71		314-334	6-11	14-19	7.6-	9.6	19-27
	2.25	108-118	165-185	16-21	9-14	15.2-17.2	20-28	64-	74	317-337	7-12	13-18	5.6-	7.6	20-28
	3	108-118	150-170	16-21	9-14	9.7-11.7	20-28	66-	76	319-339	7-12	13-18	3.6-	5.6	20-28
	1.5	113-123	206-226	11-14	10-15	19.8-21.8	18-26	90-100		350-370	11-16	14-19	10.5-12.5		25-33
50	2.25	113-123	190-210	11-14	9-14	14.5-16.5	19-27	95-105		357-377	11-16	14-19	7.9-	9.9	27-35
	3	113-123	173-193	11-14	9-14	9.3-11.3	19-27	99-109		364-384	10-15	14-19	5.2-	7.2	28-36
	1.5	119-129	305-325	9-14	12-17	18.8-20.8	17-25	123-133		391-411	12-17	14-19	13.7-15.7		33-41
70	2.25	118-128	287-307	9-14	11-14	13.8-15.8	18-26	129-139		399-419	12-17	14-19	10.3-12.3		34-42
	3	118-128	269-289	9-14	11-14	8.8-10.8	18-26	135-145		407-427	13-18	14-19	6.9-	8.9	35-43
	1.5	124-134	402-422	7-12	14-19	17.8-19.8	16-24	157-167		431-451	13-18	13-18	16.8-18.8		38-46
90	2.25	124-134	382-402	7-12	13-18	13.1-15.1	17-25	164-184		440-460	14-19	13-18	12.7-14.7		39-47
	3	123-133	363-383	7-12	13-18	8.3-10.3	17-25	172-182		450-470	16-21	12-17	8.6-10.6		41-49
110	1.5	130-140	500-520	7-12	20-25	17.0-19.0	16-24	—		—	—	—	—		—
	2.25	129-139	479-499	6-11	16-21	12.4-14.4	16-24	—		—	—	—	—		—
	3	128-138	458-478	5-10	13-18	7.8- 9.8	16-24	—		—	—	—	—		—

LEGEND

DB — Dry Bulb

—— No Heating Operation in This Temperature Range *Based on 15% Methanol antifreeze solution.

Unit Start-Up Heating Mode

NOTE: Operate the unit in heating cycle after checking the cooling cycle. Allow 5 minutes between tests for the pressure or reversing valve to equalize.

1.Turn thermostat to lowest setting and set thermostat switch to HEAT position.

2.Slowly turn the thermostat to a higher temperature until the compressor activates.

3.Check for warm air delivery at the unit grille within a few minutes after the unit has begun to operate.

4.Check the temperature of both supply and discharge wa- ter. Compare to Tables 15-25. If temperature is within range, proceed. If temperature is outside the range, check the heating refrigerant pressures in Tables 15-25.

5.Once the unit has begun to run, check for warm air deliv- ery at the unit grille.

6.Check air temperature rise across the coil when compres- sor is operating. Air temperature rise should be between 20 and 30 F after 15 minutes at load.

7.Check for vibration, noise and water leaks.

Unit Start-Up with WSHP Open Controls —

The WSHP Open is a multi-protocol (default BACnet*) con- troller with extensive features, flexible options and powerful capabilities. The unit comes from the factory pre-programmed and needs minimal set up to function in a BAS (Building Automation System) system or provide additional capabilities to Carrier's WSHP product line. Most settings on the controller have factory defaults set for ease of installation. There are a few settings that must be configured in the field and several settings that can be adjusted if required by unique job condi- tions. Refer to Appendix A — WSHP Open Screen Configura- tion. In order to configure the unit, a BACview6 display is required. See Fig. 29.

NOTE: If the WSHP Open control has lost its programming, all display pixels will be displayed on the SPT sensor. See the WSHP Third Party Integration Guide.

When the unit is OFF, the SPT sensor will indicate OFF. When power is applied, the SPT sensor will indicate tempera- ture in the space at 78 F.

*Sponsored by ASHRAE (American Society of Heating, Refrigerat- ing and Air Conditioning Engineers).

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