Carrier AQUAZONE 50HQL072-120- Manuals

13 Table 3 — Water Quality Guidelines *If the concentration of these corrosives exceeds the maximum allowable level, then the potential for serious corrosion problems exists. †Sulfides in the water quickly oxidize when exposed to air, requiring that no agitation occur as the sample is taken. Unless ...

17 AQUAZONE THERMOST A T Fig. 9 A — 50 VQ L08 0 -120 w it h C o mpl e te C Cont rols ( T ypica l)

18 AQUAZONE THERMOST A T Fig. 9 B — 50V Q L 080- 1 20 w it h Del u x e D Co n tr o ls ( T yp ic al)

26 Table 5G — 50VQL160 Blower Performance Data LEGEND NOTES:1. Due to alternate sheaves, ‘Turns Open’ may vary within ±0.5 turn from the position shown above. 2. Units factory shipped with standard static sheave and drive at 2.5 turns open (5200 cfm at 0.4 in. wg ESP Wet Coil). Other speedsrequire f...

29 D Control DIP Switches — The D Control has 2 DIP switch blocks. Each DIP switch block has 8 switches and islabeled either S1 or S2 on the circuit board. See Fig. 8B, 9Band 10B.DIP SWITCH BLOCK 1 (S1) — This set of switches offersthe following options for D Control configuration:Performance Monito...

30 Table 6 — DIP Switch Block S2 — Accessory 1 Relay Options LEGEND NOTE: All other DIP switch combinations are invalid. Table 7 — DIP Switch Block S2 — Accessory 2 Relay Options LEGEND NOTE: All other switch combinations are invalid. Auto Dehumidification Mode or High Fan Mode — Switch 7provides se...

32 Alcohols and glycols are commonly used as antifreeze agents. Freeze protection should be maintained to 15 F belowthe lowest expected entering loop temperature. For example, ifthe lowest expected entering loop temperature is 30 F, the leav-ing loop temperature would be 22 to 25 F. Therefore, the f...

33 EMERGENCY HEAT — In Emergency Heat mode, the FanEnable and Fan Speed relays are turned on. The EH1 output isturned on immediately. With continuing Emergency Heat de-mand, EH2 will turn on after 5 minutes. Fan Enable and FanSpeed relays are turned off after a 60-second delay. The controlreverts to...

35 Condenser Cleaning — Water-cooled condensers may require cleaning of scale (water deposits) due to improperlymaintained closed-loop water systems. Sludge build-up mayneed to be cleaned in an open water tower system due toinduced contaminants. Local water conditions may cause excessive fouling or ...

36 TROUBLESHOOTING (Fig. 16 and 17, and Table 14) When troubleshooting problems with a WSHP, consider the following: Thermistor — A thermistor may be required for single- phase units where starting the unit is a problem due to lowvoltage. See Fig. 16 for thermistor nominal resistance. Control Sensor...

37 Table 14 — Troubleshooting LEGEND FAULT HEATING COOLING POSSIBLE CAUSE SOLUTION Main Power Problems X X Green Status LED Off Check line voltage circuit breaker and disconnect.Check for line voltage between L1 and L2 on the contactor.Check for 24 VAC between R and C on controller.Check primary/sec...

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. PC 111 Catalog No. 536-203 Printed in U.S.A. Form 62AQ-1SI Pg CL-1 7-99 Replaces: New Book 1 1 1 4 4 4 Tab 1a 1b 5a 5a 6a 6b CL-1 50HQL,VQL START-UP CHEC...

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. PC 111 Catalog No. 535-00096 Printed in U.S.A. Form 50H,V-9SI Pg CL-2 6-03 Replaces: 50H,V-8SI Book 1 4 Tab 5a 5a Copyright 2003 Carrier Cor poration - -...