Carrier HS070-160 User Manual download pdf

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.

PC 903 Catalog No. 563-065 Printed in U.S.A. Form 30G,H-3SI Pg 1 7-99 Replaces: 30HW-7SI

Book 2

Tab 5c

Installation Instructions

Part No. 30HW900003

SAFETY CONSIDERATIONS

Installing, starting up, and servicing air-conditioning equip-

ment can be hazardous due to system pressures, electrical

components, and equipment location.

Only trained, qualified installers and service technicians

should install, start up, and service this equipment.

When working on air-conditioning equipment, observe pre-

cautions in the literature and on tags, stickers, and labels at-

tached to the equipment.

Follow all safety codes. Wear safety glasses and work

gloves. Use care in handling equipment.

GENERAL

Check Package Contents —

Check for damage to

the part. Accessory package 30HW900003 contains the flow

switch (a differential flow switch, Carrier part no.

HK06ZC033). If damage is found, file a claim immediately

with the shipper.

Description —

The accessory flow switch (see Fig. 1) is a

single-pole, double-throw, snap-acting switch with a normally-

open contact that closes on differential pressure rise and opens

on differential pressure fall.

NOTE: The maximum fluidside working pressure MUST NOT

EXCEED 150 psig. For applications requiring higher pressure,

contact your local Carrier representative.

NOTE: On 30GTN,GTR units, the flow switch and connecting

piping is susceptible to freeze-up when the outdoor ambient

temperature is less than 32 F (0º C) and antifreeze solution is

not used. This is due to the small amount of mass in the piping

and the switch. In addition, the piping and the switch are not

insulated or wrapped with heat tape.

NOTE: On some units, the differential pressure will be less

than the lowest switch setting. In these instances, accessory

flow switch part no. 30HW900003 is not appropriate.

NOTE: For reliable operation, the minimum flow through the

cooler should not result in less than 5 ft of pressure drop.

Contact your local Carrier representative for more informa-

tion regarding your specific application.

ELECTRIC SHOCK HAZARD

To avoid the possibility of electrical shock,

open all disconnects before installing or

servicing this equipment.

30GTN,GTR

30HK,HL,HR,HS,HW

Accessory Flow Switch

50/60 Hz

Fig. 1 — Flow Switch

LEGEND

COM

—

Common

—

Normally Closed

—

Normally Open

1 2 3 4 5 6 7 8

Summary of Contents

Page 1 - Installation Instructions

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.PC 9

Page 2 - Field Supplied Items

2The range is adjustable;DIFFERENTIAL PRESSURE FALL (OFF):1.0 to 9.0 psi (7 to 62 kPa)DIFFERENTIAL PRESSURE RISE (ON):2.0 to 10.0 psi (14 to 70 kPa).

Page 3

3Step 2 — Disconnect Unit Electrical PowerSupply — Open and tag all disconnects. Be sure all poweris off before work begins.Step 3 — Close Both Sides

Page 4

4ENGLISHSICOOLER PRESSURE DROP KEY1 — 30GTN,GTR130,1502 — 30GTN,GTR170,1903 — 30GTN,GTR210NOTE: Ft of water = 2.31 x change in psig.Fig. 3 — Cooler Fl

Page 5 - ENGLISH AND SI

5ENGLISH AND SICOOLER PRESSURE DROP KEY1 Module B — 30GTN,GTR230,2452 Module B — 30GTN,GTR255,290,315NOTE: Ft of water = 2.31 x change in psig.Fig.

Page 6

6ENGLISHSICOOLER PRESSURE DROP KEY1Module B — 30GTN,GTR2702Module A — 30GTN,GTR230-2553Module A — 30GTN,GTR270,330Module B — 30GTN,GTR330,360 (50 Hz)4

Page 7

7Step 6 — Remove Flow Switch Cover — Re-move cover to expose electrical terminals. Insert 2 field-supplied, 16-gage (1.5-mm) wires into the switc

Page 8

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.PC 9

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Carrier HS070-160 User Manual

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