Controls, Start-Up, Operation, Service and ... - Climayoreo

Use the following procedure to adjust charge on Circuit B
of Humidi-MiZer equipped units:
1. Start all compressors and outdoor fans. Allow unit to run
for 5 minutes.
2. Switch system to run in a Dehumidification mode for 5
minutes by switching RHV to ON through the Service
Test function (Service TestCOOLRHV).
3. At the end of the 5 minute period, switch back into Cooling
mode through the Service Test function (Service
TestCOOLRHV) by switching RHV to OFF.
Saturated Discharge Temperature (deg F)
Saturated Discharge Temperature (deg F)
150
145
140
135
130
125
120
115
110
105
100
95
90
30 Ton STD CAP CIRCUIT A Charging Chart
All Compressors on a Circuit Must be Operating
All Outdoor Fans Must be Operating
Reduce Charge if Above Curve
144
4. Using the cooling charging charts provided (Fig. 52-89),
add or remove refrigerant until conditions of the chart are
met. As conditions get close to the point on the chart, add
or remove charge in ¼ lb increments until complete. See
paragraph “To Use the Cooling Charging Chart” for additional
instructions.
5. If a charge adjustment was necessary in Step 4, then repeat
the steps in this paragraph (starting with Step 2) until
no charge adjustment is necessary. When no more charge
adjustment is necessary after switching from a Dehumidification
Mode to a Cooling Mode (Steps 2 and 3), then
the charge adjustment procedure is complete.
85
55 60 65 70 75 80 85 90 95 100 105 110 115 120
150
145
140
135
130
125
120
115
110
105
100
95
90
85
Outdoor Air Temperature (deg F)
Add Charge if Below Curve
Fig. 52 — Charging Chart — 48/50P030 Standard Units — Circuit A
30 Ton STD CAP CIRCUIT B Charging Chart
All Compressors on a Circuit Must be Operating
All Outdoor Fans Must be Operating
Reduce Charge if Above Curve
55 60 65 70 75 80 85 90 95 100 105 110 115 120
Outdoor Air Temperature (deg F)
Add Charge if Below Curve
Fig. 53 — Charging Chart — 48/50P030 Standard Units — Circuit B
SST= 60 F
SST= 45 F
SST= 30 F
SST= 60 F
SST= 45 F
SST= 30 F
a48-8518
a48-8519