Cooling tower/boiler systems, Operation power up mode, Units with aquazone™ complete c control – Carrier AQUAZONE 50PEC09-18 User Manual

Page 40: Units with aquazone deluxe d control

Table 13 — Approximate Fluid Volume (gal)

per 100 ft of Pipe

LEGEND

NOTE: Volume of heat exchanger is approximately 1.0 gallon.

Table 14 — Antifreeze Percentages by Volume

Cooling Tower/Boiler Systems —

These systems

typically use a common loop maintained at 60 to 90 F. Carrier

recommends using a closed circuit evaporative cooling tower

with a secondary heat exchanger between the tower and the

water loop. 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 30 to 110 F. The external loop

field is divided up into 2 in. 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

delay upon power up.

Units with Aquazone™ Complete C Control

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 ini-

tiate 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.
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.
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. The compressor relay will re-

main on and EH1 (emergency heat) is immediately turned on.

EH2 will turn on after 10 minutes of continual Stage 2 demand.
NOTE: EH2 will not turn on (or if on, will turn off) if FP1

(freeze protection) temperature is greater than 45 F and FP2 is

greater than 110 F.
EMERGENCY HEAT — In Emergency Heat (EH) mode,

terminal W is active while terminal Y is not. Terminal G must

be active or the W terminal is disregarded. EH1 is immediately

turned on. EH2 will turn on after 5 minutes of continuous

emergency heat demand.

Units with Aquazone Deluxe D Control

STANDBY/FAN ONLY — The compressor will be off. The

fan enable, fan speed, and reversing valve (RV) relays will be

on if inputs are present. If there is a Fan 1 demand, the fan

enable will immediately turn on. If there is a Fan 2 demand, the

fan enable and fan speed will immediately turn on.
NOTE: DIP switch 5 on S1 does not have an effect upon Fan 1

and Fan 2 outputs.
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

functions will operate per their associated DIP switch 2 setting

on S1.
HEATING STAGE 2 — In Heating Stage 2 mode, the fan en-

able and compressor relays remain on. The fan speed relay is

turned on immediately and turned off immediately once the de-

mand is removed. The control reverts to Heating Stage 1 mode.

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.
HEATING STAGE 3 — In Heating Stage 3 mode, the fan en-

able, fan speed and compressor relays remain on. The EH1 out-

put is turned on immediately. With continuing Heat Stage 3 de-

mand, EH2 will turn on after 10 minutes. EH1 and EH2 are

turned off immediately when the Heating Stage 3 demand is re-

moved. The control reverts to Heating Stage 2 mode.

Output EH2 will be off if FP1’s temperature is greater than

45 F AND FP2 (when shorted) is greater than 110 F during

Heating Stage 3 mode. This condition will have a 30-second

recognition time. Also, during Heating Stage 3 mode, EH1,

EH2, fan enable, and fan speed will be ON if G input is not

active.
EMERGENCY HEAT — In Emergency Heat mode, the fan

enable and fan speed relays are turned on. The EH1 output is

turned on immediately. With continuing emergency heat de-

mand, EH2 will turn on after 5 minutes. Fan enable and fan

speed relays are turned off after a 60-second delay. The control

reverts to Standby mode.

Output EH1, EH2, fan enable, and fan speed will be ON if

the G input is not active during Emergency Heat mode.
COOLING STAGE 1 — In Cooling Stage 1 mode, the fan

enable, compressor and RV relays are turned on immediately.

If configured as stage 2 (DIP switch set to OFF) then the com-

pressor and fan will not turn on until there is a stage 2 demand.

The fan enable and compressor relays are turned off immedi-

ately when the Cooling Stage 1 demand is removed. The con-

trol 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 func-

tions will track with their associated DIP switch 2 on S1.
COOLING STAGE 2 — In Cooling Stage 2 mode, the fan

enable, compressor and RV relays remain on. The fan speed re-

lay is turned on immediately and turned off once the Cooling

Stage 2 demand is removed. The control reverts to Cooling

Stage 1 mode. If there is a master/slave or dual compressor

PIPE

DIAMETER (in.)

VOLUME (gal.)

Copper

4.1

1.25

6.4

1.5

9.2

Rubber Hose

3.9

Polyethylene

IPS SDR11

2.8

1 IPS SDR11

4.5

IPS SDR11

8.0

IPS SDR11

10.9

2 IPS SDR11

18.0

IPS SCH40

8.3

IPS SCH40

10.9

2 IPS SCH40

17.0

IPS

— Internal Pipe Size

SCH

— Schedule

SDR

— Standard Dimensional Ratio

ANTIFREEZE

MINIMUM TEMPERATURE FOR FREEZE

PROTECTION (F)

Methanol (%)

100% USP Food Grade
Propylene Glycol (%)