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11

30MPW UNITS — In order to minimize the water pressure

drop in the system, use as few bends as possible in the field

water piping, and run the lines as short as possible. Size the

water lines according to the available pump pressure (not neces-

sarily the connection size), especially on cooling tower applica-

tions. See Carrier System Design Manual, Part 3, Piping Design.

See Fig. 12 for condenser pressure drops.

Set water regulating valve, if installed, to maintain design

head pressure. Do not adjust to compensate for high head pres-

sures caused by fouled condensers, excess refrigerant, or the

presence of noncondensables. Due to changes in water temper-

ature, it may be necessary to adjust the valve seasonally. After

adjusting for design head pressure, shut unit down. The water

regulating valve should shut off the flow of water in a few min-

utes. If it does not, raise head pressure setting. Make sure that

the capillary tube from each water regulating valve is connect-

ed to the proper condenser access fitting.

Provide a means for draining the system in the winter (if not

used) and for maintenance.

Water leaving the condenser is under pressure and should

not be connected directly into sewer lines. Check local codes.
EVAPORATOR DESCRIPTION — All  30MP  units  use  a

brazed-plate heat-exchanger type evaporator. The heat ex-

changer is constructed essentially the same as the brazed-plate

condenser used on 30MPW units. See 30MPW Condenser De-

scription section on page 10 for more details. Similar to the

condenser, the evaporator can only be chemically cleaned. See

Fig. 13 for evaporator pressure drops.
EVAPORATOR PIPING — Plan evaporator fluid piping for

minimum number of changes in elevation, and for the fewest

number of bends possible. Install manual or automatic vent

valve at high points in the line. Maintain system pressure by

using a pressure tank or a combination of relief and reducing

valves.

A strainer with a minimum of 40 mesh 

must

 be installed

within 10 ft of the evaporator fluid inlet to prevent debris from

clogging or damaging the heat exchanger. This strainer is re-

quired and is available as an accessory.

See Carrier System Design Manual, Part 3, Piping Design,

for chilled fluid piping details.

The evaporator fluid inlet and outlet connections are victau-

lic. The fluid enters at the top connection and leaves at the bot-

tom connection. Procedures for making the connections are the

same as for the 30MPW condensers. See 30MPW Condenser

section on page 10 for more details.

Run the pump for 10 minutes, then clean the strainer before

starting the unit.

An evaporator flow switch is standard on all units. This is a

thermal dispersion type switch that is installed in evaporator

fluid outlet. The switch is set to open when the evaporator fluid

flow drops below the minimum set point.

For variable primary flow applications, it may be necessary

to adjust the flow switch set point to avoid nuisance trips. Con-

tact Carrier service engineering for the method needed to adjust

the switch.

See Table 5 for minimum flow rates. See Table 6 for mini-

mum loop volume.

Table 5 — Minimum Evaporator and Condenser 

Flow Rates

Table 6 — Minimum Fluid Volume in Circulation

LEGEND

The thermistors used to sense entering and leaving fluid

temperature are factory-installed in the evaporator entering and

leaving fluid nozzles.
AIR SEPARATION  — For proper system operation, it is

essential that water loops be installed with proper means to

manage air in the system. Free air in the system can cause

noise, reduce terminal output, stop flow, or even cause pump

failure due to pump cavitation. For closed systems, equipment

should be provided to eliminate all air from the system. 

The amount of air that water can hold in solution depends

on the pressure and temperature of the water/air mixture. Air is

less soluble at higher temperatures and at lower pressures.

Therefore, separation can best be done at the point of highest

water temperature and lowest pressure. Typically, this point

would be on the suction side of the pump as the water is return-

ing from the system or terminals. Generally speaking, this is

the best place to install an air separator, if possible.

1. Install automatic air vents at all high points in the system.

(If the 30MP unit is located at the high point of the

system, a vent can be installed on the piping entering the

heat exchanger on the ¼-in. NPT female port.)

2. Install an air separator in the water loop, at the place

where the water is at higher temperatures and lower

pressures — usually in the chilled water return piping.

On a primary-secondary system, the highest temperature

water is normally in the secondary loop, close to the

decoupler. Preference should be given to that point on the

system (see Fig. 14). In-line or centrifugal air separators

are readily available in the field.

Fig. 11 — Install the Victaulic Coupling

a30-1245

UNIT SIZE

EVAPORATOR

CONDENSER

Gal./Min

L/s

Gal./Min

L/s

30MP015

22

1.4

22

1.4

30MP020

2

8

1.

8

2

8

1.

8

30MP030

43

2.7

43

2.7

30MP040

55

3.5

55

3.5

30MP045

64

4.0

64

4.0

30MP UNIT 

SIZE

NORMAL AIR 

CONDITIONING 

APPLICATION

gal/ton (L per kW)

PROCESS COOLING OR

LOW AMBIENT OPERATION

APPLICATION

gal/ton (L per kW)

Std Unit

HGBP

Digital

Std Unit

HGBP

Digital

015

6 (6.5)

4 (4.3)

10 (10.

8

) 10 (10.

8

)

020-030

6 (6.5)

4 (4.3)

3 (3.3)

10 (10.

8

) 10 (10.

8

)

6 (6.5)

040-045

3 (3.3)

3 (3.3)

3 (3.3)

6 (6.5)

6 (6.5)

6 (6.5)

HGBP —

Hot Gas Bypass

Summary of Contents for AQUASNAP 30MPA

Page 1: ...ese installation instructions cover the 30MPA MPW units with ComfortLink controls The 30MPA units are condenserless units and the 30MPW units are all fluid cooled See Fig 1 and 2 SAFETY CONSIDERATIONS Installing starting up and servicing this equipment can be hazardous due to system pressures electrical components and equipment location roofs elevated structures etc Only trained qualified installe...

Page 2: ... oil to add to the system e Carefully unsweat remaining tubing stubs when nec essary Oil can ignite when exposed to torch flame Failure to follow these procedures may result in personal injury or death CAUTION DO NOT re use compressor oil or any oil that has been exposed to the atmosphere Dispose of oil per local codes and regulations DO NOT leave refrigerant system open to air any longer than the...

Page 3: ... TABLE FOR QTY OUT IN OPTIONAL SOUND ENCLOSURE FIELD CONNECTION 4 7 8 K O NON FUSED DISCONNECT OPTIONAL 1 4 FPT ACCESS P T ACCESS PORTS 1 4 SAE FLARE RELIEF CONNECTION POWER ENTRY WATER CONNECTIONS IN OUT 2 VICTAULIC 015 020 2 1 2 VICTAULIC 030 045 COOLER COOLER COOLER CONTROL PANEL END OPPOSITE CONTROL PANEL END MOUNTING HOLES 9 16 MOUNTING HOLES 9 16 IN OUT 040 045 TON ONLY FORK POCKETS SCROLLIN...

Page 4: ...t 2 Denotes center of gravity 3 Dimensions are shown in inches Dimensions in are in millimeters 4 Allow 36 in 914 mm clearance on control panel end opposite control panel end and above the unit All clearances must be in accordance with local codes 5 Denotes accessory or factory installed option a30 5033 ...

Page 5: ... 0 8 1 2 2 4 3 2 3 4 Maximum Refrigerant Pressure psig 505 505 565 565 565 Maximum Fluid Side Pressure psig 300 300 300 300 300 Water Connections in Inlet and Outlet Victaulic IPS 2 2 21 2 21 2 21 2 Drain NPT 1 2 1 2 1 2 1 2 1 2 CONDENSER 30MPW Only Weight lb empty 34 9 43 6 104 6 136 7 188 3 Net Fluid Volume gal 1 2 1 6 2 9 4 1 5 9 Maximum Refrigerant Pressure psig 505 505 565 565 565 Maximum Flu...

Page 6: ...kPa 3482 3482 3896 3896 3896 Maximum Fluid Side Pressure kPa 2068 2068 2068 2068 2068 Water Connections in Inlet and Outlet Victaulic IPS 11 2 11 2 2 2 2 CONDENSER REFRIGERANT CONNECTIONS 30MPA Only Liquid Line ODS in 1 2 1 2 5 8 5 8 5 8 Discharge Line ODS in 13 8 13 8 13 8 15 8 15 8 CHASSIS DIMENSIONS mm Length 1397 1397 1397 1397 1397 Width 813 813 813 813 813 Height 1588 1588 1588 1588 1588 MIN...

Page 7: ...t is installed verify that mounting bolt torque is 7 to 10 ft lb 9 to 14 Nm Step 5 Make Piping Connections See Fig 8 and 9 for typical piping applications 30MPA SYSTEM CONDENSER For detailed condenser piping installation instructions for 30MPA systems refer to separate instructions packaged with the remote condenser units Condenser refrigerant piping for 30MPA units should be sized to minimize the...

Page 8: ...ques Refer to Carrier System Design Manual or appropriate ASHRAE American Society of Heating Refrigerating and Air Conditioning Engineers handbook for details 5 See Tables 1A and 1B for minimum system fluid volume This system may require the addi tion of a holding tank to ensure adequate volume 6 A strainer with a minimum of 40 mesh must be installed within 10 ft 3 m of the evaporator fluid inlet ...

Page 9: ... of Heating Refrigerating and Air Condi tioning Engineers handbook for details on proper piping sizes and design 5 See Tables 1A and 1B for minimum system fluid volume This system may require the addition of a holding tank to ensure adequate volume 6 Hot gas lines should rise above refrigerant level in condenser circuit Double riser may be required check unit minimum capacity 7 Trap should be inst...

Page 10: ... use a brazed plate heat exchanger type condenser These heat exchangers are made of embossed plates of acid resistant stainless steel Every other plate is reversed so that the ridges of the herringbone pattern intersect one another on adjacent plates forming a lattice of contact points These plates are vacuum brazed together to form a compact and pressure resistant heat exchanger After brazing the...

Page 11: ... evaporator flow switch is standard on all units This is a thermal dispersion type switch that is installed in evaporator fluid outlet The switch is set to open when the evaporator fluid flow drops below the minimum set point For variable primary flow applications it may be necessary to adjust the flow switch set point to avoid nuisance trips Con tact Carrier service engineering for the method nee...

Page 12: ...0 110 120 130 140 150 160 170 180 190 200 210 220 230 240 GPM 120 100 80 e Drop kPa 40 60 Water Pressure 20 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Liters second 1 2 3 5 4 Fig 12 Condenser Water Pressure Drop ENGLISH SI LEGEND 1 30MP015 2 30MP020 3 30MP030 4 30MP040 5 30MP045 a30 5037 a30 5036 ...

Page 13: ... 160 170 180 190 200 Water Pressure Drop GPM 1 5 4 3 2 120 3 100 80 e Drop kPa 40 60 Water Pressure 20 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 Liters second 1 2 4 5 Fig 13 Evaporator Water Pressure Drop ENGLISH SI LEGEND 1 30MP015 2 30MP020 3 30MP030 4 30MP040 5 30MP045 a30 5035 a30 5034 ...

Page 14: ...the desired slightly alkaline water pH of 8 to 9 Avoid a pH greater than 10 since this will adversely affect pump seal components c A side stream filter is recommended see Fig 16 during the cleaning process Filter side flow rate should be enough to filter the entire water volume every 3 to 4 hours Change filters as often as neces sary during the cleaning process d Remove temporary bypass when clea...

Page 15: ...ined for the required gpm Step 7 Make Electrical Connections All field wiring must comply with local code requirements Electrical data for the complete unit and for the compressors is shown in Table 8 See Fig 17 for field wiring connections A field supplied branch circuit disconnect switch that can be locked in either OPEN or OFF position must be installed Control circuit power is 24 v on all unit...

Page 16: ...voltage 3 0 for unit sizes 015 020 208 230 3 60 voltages 020 040 380 3 60 voltage 030 045 460 3 60 and 575 3 60 voltages 2 AWG for unit sizes 015 380 3 60 voltage 015 020 460 3 60 and 575 3 60 voltages 3 Additional control circuit power is not required 4 Any field modification of factory wiring must be in compliance with all applicable codes Field installed power wires must be rated 75 C minimum 5...

Page 17: ...n power and control power entrance locations 5 Terminal 24 of the LVT is for control of chilled water pump CWP starter Terminal 20 of the LVT is for control of condenser pump CNP starter or condenser fan relay CFR The maximum load allowed for the relays is 5 VA sealed 10 VA inrush at 24 VAC Field power supply is not required 6 Terminal 25 of LVT is for an alarm relay The maximum load allowed for a...

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Page 20: ... discontinue or change at any time specifications or designs without notice and without incurring obligations Catalog No 04 53300077 01 Printed in U S A Form 30MP 5SI Pg 20 612 11 11 Replaces 30MP 1SI Copyright 2011 Carrier Corporation ...

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