Carrier PSD006-070 Unit Start-Up Heating Mode, Water Temperature Change Through Heat Exchanger

4.Check the temperature of both supply and discharge water. Compare to Tables 20-30. If temperature is within range, proceed. If temperature is outside the range, check the cooling refrigerant pressures in Tables 20-30.

5.Check air temperature drop across the coil when com- pressor is operating. Air temperature drop should be between 15 and 25 F.

Table 19 — Water Temperature Change

through Heat Exchanger

	COOLING		HEATING
WATER FLOW RATE (GPM)	RISE (F)		DROP (F)
	Min	Max	Min	Max
For Closed Loop: Ground Source or	9	12	4	8
Cooling/Boiler Systems at 3 gpm/ton
For Open Loop: Ground Water Systems at	20	26	10	17
1.5 gpm/ton

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 water. Compare to Tables 20-30. If temperature is within range, proceed. If temperature is outside the range, check the heating refrigerant pressures in Tables 20-30.

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.

Table 20 — 50PSH, PSV, PSD006 Typical Unit Operating Pressures and Temperatures

ENTERING		FULL LOAD COOLING — WITHOUT HWG ACTIVE						FULL LOAD HEATING — WITHOUT HWG ACTIVE
	WATER	Suction	Discharge	Super-	Sub-	Water	Air Temp	Suction	Discharge	Super-	Sub-		Water	Air Temp
WATER	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
30	1.5	114-124	142-162	24-29	3-8	15.2-17.2	17-23	75-85	272-292	13-18	4-	9	5.9- 7.9	16-22
	2.25	111-121	132-152	26-31	3-8	11.4-13.4	17-23	78-88	274-294	13-18	4-	9	4.3- 6.3	16-22
	3	109-119	122-142	28-33	3-8	7.5-9.5	17-23	81-91	276-296	13-18	4-	9	2.7- 4.7	17-23
50	1.5	130-140	190-210	14-19	2-7	16.5-18.5	18-24	104-114	299-319	12-17	6-11		8.8-10.8	21-27
	2.25	129-139	180-200	16-21	2-7	12.3-14.3	18-24	112-122	304-324	12-17	4-	9	6.7- 8.7	22-28
	3	128-138	170-190	19-24	2-7	8.00-10.0	18-24	120-130	308-328	12-17	3-	8	4.5- 6.5	23-29
70	1.5	143-153	265-285	9-14	2-7	15.5-17.5	18-24	129-139	321-341	11-16	7-12		11.2-13.2	25-31
	2.25	141-151	252-272	10-15	2-7	11.5-13.5	18-24	144-154	330-350	13-18	4-	9	8.8- 10.8	27-33
	3	140-150	240-260	11-16	2-7	7.5-9.5	18-24	159-169	340-360	15-20	3-	8	6.3- 8.3	28-34
90	1.5	149-159	340-370	8-13	2-7	14.2-16.2	17-23	163-173	349-369	13-18	7-12		14.3-16.3	30-36
	2.25	149-159	335-355	8-13	2-7	10.6-12.6	17-23	180-190	360-380	11-16	4-	9	11.2-13.2	32-38
	3	148-158	320-340	8-13	2-7	7.00-9.00	17-23	198-208	372-392	10-15	3-	8	8.1-10.1	34-40
110	1.5	154-164	451-471	8-13	2-7	12.7-14.7	15-21	—	—	—	—		—	—
	2.25	154-164	428-448	8-13	2-7	9.5-11.5	15-21	—	—	—	—		—	—
	3	153-163	405-425	8-13	2-7	6.5-8.5	15-21	—	—	—	—		—	—

LEGEND

DB — Dry Bulb

HWG — Hot Water Generator

—— No Heating Operation in This Temperature Range

Table 21 — 50PSH, PSV, PSD009 Typical Unit Operating Pressures and Temperatures

ENTERING			FULL LOAD COOLING — WITHOUT HWG ACTIVE						FULL LOAD HEATING — WITHOUT HWG ACTIVE
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	126-136	161-181	17-22	8-13	19.8-21.8	21-27	74-84	278-298	6-11	4-9	6.1-8.1	18-24
		2.25	126-136	146-166	17-22	7-12	14.9-16.9	21-27	77-87	280-300	6-11	4-9	4.5-6.5	18-24
		3	126-136	131-151	17-22	6-11	9.9-11.9	21-27	79-89	283-303	6-11	3-8	2.8-4.8	19-25
	50	1.5	132-142	215-235	10-15	8-13	18.8-20.8	20-26	104-114	309-329	8-12	7-12	9.6-11.6	24-30
		2.25	132-142	200-220	10-15	7-12	14.1-16.1	20-26	106-116	312-332	8-12	7-12	7.0-9.0	24-30
		3	132-142	185-205	10-15	6-11	9.4-11.4	20-26	108-118	315-335	8-12	7-12	4.5-6.5	25-31
	70	1.5	138-148	278-298	8-13	9-14	17.7-19.7	19-25	127-137	332-352	10-15	10-15	12.0-14.0	29-35
		2.25	138-148	263-283	8-13	8-13	13.1-15.1	19-25	132-142	340-360	11-16	10-15	9.0-10	29-35
		3	137-147	248-268	8-13	7-12	8.5-10.5	19-25	138-148	347-367	13-18	10-15	6.1-8.1	30-36
	90	1.5	142-152	365-385	8-13	9-14	16.0-18.0	18-24	164-174	372-392	17-22	13-18	14.5-16.5	35-41
		2.25	142-152	351-371	8-13	8-13	12.0-14.0	18-24	165-175	375-395	18-23	13-18	11.2-13.2	35-41
		3	142-152	337-357	8-13	7-12	8.0-10.0	18-24	167-177	379-399	19-24	13-18	7.9-9.9	36-42
	110	1.5	150-160	439-459	7-12	9-14	14.2-16.2	17-23	—	—	—	—	—	—
		2.25	150-160	439-459	7-12	8-13	10.6-12.6	17-23	—	—	—	—	—	—
		3	150-160	439-459	7-12	7-12	6.9-8.9	17-23	—	—	—	—	—	—
		LEGEND
DB	— Dry Bulb
HWG — Hot Water Generator
—	— No Heating Operation in This Temperature Range

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