Krack CDC-0100H2 Installation Manual

S**//

D**//

P**

Seerriieess

Aiirr

Coooolleedd

IIn

peerraattii

nssttaallllaattiioo

Maa

Coonnddeennssiinngg

ngg

aan

uaall

Unniittss

CS/CD/CP AIR COOLED CONDENSING UNITS (P/N E207120C R2)

TABLE OF CONTENTS

I. Receipt of Equipment………………………………2

II. Piping………………..…………………………….4

III. System Evacuation….…………………………….5

IV. Electrical………………..………………………...5

V. Charging the System..……………………………..5

VI. Operation Checkout………………….…………...6

VII. Features and Controls……….……………….…..6

VIII. Normal Maintenance……………………………8

TABLES:

Table 1A&B: Recommended Line Sizes…….………..9, 10

Table 2A,B&C: Condensing Unit Refrigerant Charge..11, 12, 13

Table 3A&B: Low Pressure Control Settings…………14

CS/CD/CP AIR COOLED CONDENSING UNITS (P/N E207120C R2) 1

Commercial Large Condensing Unit Model Key

CP I - 0700 H 2 M

Condensing Unit Family

CS - Single Compressor CP - Parallel Compressors K - 208/230/3/60 CD - Dual Compressors

Compressor Manufacturer

C - Carlyle Semi-Hermetic D - Copeland Discus

I - Ingersoll Rand Semi-Hermetic 2 (V) - R22 V - Copeland Screw 4 (S)- R404A

Total HP

0100 = 10 HP w/std condenser 0101 = 10 HP w/oversized condenser H - High 0700 = (2) 35 HP w/std condenser M - Medium 0701 = (2) 35 HP w/oversized condenser L - Low

oltage

M - 460/3/60 P - 575/3/60 U - 380/3/50

Refrigerant

7 (P) - R507

Temperature

I. RECEIPT OF EQUIPMENT

A) DAMAGE CHECK All equipment should be carefully checked for damage as soon as it is received. If any damage is evident, a notation must be made on the delivery receipt before it is signed and claim should then be filed against the freight carrier.

B) CHECK VOLTAGE Carefully check nameplate voltage and current characteristics to be sure unit is compatible with power supply.

C) HANCDING Never hoist the unit from any point excepting the base lifting holes provided for this purpose. Lift with spreader and hooks as shown in Figure 1. When moving unit by forklift, lift from compressor end ONLY. Do not lift from condenser end.

CS/CD/CP AIR COOLED CONDENSING UNITS (P/N E207120C R2) 2

Figure 1.

D) LEVELING AND BOLT DOWN PROCEDURE A solid level foundation should be provided for the unit large enough to accommodate the full length of the base rails. If the mounting location is not sturdy and perfectly level, place shims under low points before tightening down with hold-down bolts. Improper bolting-down procedure can seriously warp the framework, particularly with the large condenser fan units (3 fans or more).

E) UNIT LOCATION Large air-cooled condensing units dissipate a tremendous amount of heat and require large volumes of air. Short-circuiting of the condenser air, or restricting the free entry of air into the coil will result in reduced capacity and highpower consumption. Take care to reduce such negative operation effects by providing for unrestricted free airflow into and from the unit. At most, the unit should not be positioned so as to have no more than one of its sides positioned close to a vertical building side or wall. At that point, this should be a minimum of 3’ unit-to-wall free air clearance distance.

F) LOSS OF GAS HOLDING CHARGE Each Condensing unit is evacuated to remove moisture, leak tested, and then shipped with a gas holding charge. Absence of this charge may indicate a leak has developed in transit. The system should not be charged with refrigerant until it is verified that there is no leak or the source of the leak is located.

G) CHECK COMPRESSOR The compressor is bolted to the base of the condensing unit using solid mounting techniques. Check the compressor mounting bolts. Tighten these bolts as much as possible to prevent excess vibration. Check electrical junction connections of the compressor; tighten only those that may have come loose during transit.

CS/CD/CP AIR COOLED CONDENSING UNITS (P/N E207120C R2) 3

II. PIPING

1) REFRIGERATION PIPING

Use ACR grade copper tubing, or conform otherwise to local and national codes. Piping methods must meet these codes and result in acceptable piping practice.

A) SUCTION LINE Design and sizing of the suction line is critical to maintain:

1) Proper refrigerant velocity

2) Practical pressure drop (usually equivalent to 2 F maximum)

3) For proper oil return, all horizontal lines should be sloped downwards toward compressor at 1 inch per 10 feet.

Suction line risers must be trapped at the bottom of the rise and at every 20-foot increment for proper oil return. The proper balance is to design suction lines for approximately 1,200 ft. per min. velocity in risers and approximately 600 ft per min. velocity in horizontal lines. “P” traps should be installed at the bottom of all risers in suction lines for proper oil return.

Table 1 lists common suction line sizing that can be used with-but not instead of -ASHRAEguidelines.

Suction lines should not be exposed to heat unless insulated. Insulation also prevents sweating and subsequent damage to goods. B) LIQUID LINE Avoid excessive liquid line pressure drop by using Table 1 and ASHRAE guidelines to size the liquid line. Install a liquid line solenoid valve at the evaporator.

On parallel compressor systems, if one compressor cycles off due to part load conditions, suction lines must be sized to allow for oil return under reduced load conditions.

2) LINE FABRICATION & SOLDERING

Copper pipe should be cut with a wheel type cutter and not with a hacksaw. Using a hacksaw produces copper filings that can cause problems if it gets into the system. Also, if the pipes to be used are not capped and perfectly clean, they should be cleaned with a clean lint free rag before fabrication into the system.

Soft solders should be avoided wherever possible, as in most cases they require the use of a flux. Most of the low temperature solder flux consists of heavy wax type materials which if allowed to enter the system cause excessive service problems in the form of wax at expansion valves which looks like moisture but cannot be removed by the average dryer core. Where silver brazing must be used between copper and brass or copper and steel joints, care should be taken to avoid excessive use of flux lest it be introduced into the system to create problems at a later date. EasyFlo or silver solders that contain sufficient silver content to still retain joint strength and yet require minimum use of flux are recommended here.

CS/CD/CP AIR COOLED CONDENSING UNITS (P/N E207120C R2) 4

+ 11 hidden pages