036-21539-003-B-0305
2 Unitary Products Group
TABLE OF CONTENTS
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
PRODUCT NOMENCLATURE. . . . . . . . . . . . . . . . . . . . . . . 4
FEATURES. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
REHEAT MODE SEQUENCE OF OPERATION . . . . . .16
FACTORY-INSTALLED OPTIONS . . . . . . . . . . . . . . . . . .19
FIELD-INSTALLED ACCESSORIES. . . . . . . . . . . . . . . . . 20
GUIDE SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . 60
LIST OF FIGURES
Fig. #
Pg. #
1 UNIT CUTAWAY. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
2 REHEAT CONTROL BOARD . . . . . . . . . . . . . . . . . . . .17
3 REHEAT CONTROLS - PART 1. . . . . . . . . . . . . . . . . . 18
4 REHEAT CONTROLS - PART 2. . . . . . . . . . . . . . . . . . 18
5 DR180 MOISTURE REMOVAL - ALTERNATE MODE 31
6 DR180 MOISTURE REMOVAL - NORMAL MODE . . . 31
7 DR240 MOISTURE REMOVAL - ALTERNATE MODE 32
8 DR240 MOISTURE REMOVAL - NORMAL MODE . . . 32
9 DR300 MOISTURE REMOVAL - ALTERNATE MODE 33
10 DR300 MOISTURE REMOVAL - NORMAL MODE . . . 33
11 ALTITUDE/TEMPERATURE CONVERSION FACTOR 35
12 UNIT DIMENSIONS DR180, 240 & 300
(FRONT VIEW) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54
13 UNIT DIMENSIONS (REAR VIEW). . . . . . . . . . . . . . . . 55
14 UNIT CENTER OF GRAVITY . . . . . . . . . . . . . . . . . . . .55
15 UNIT DIMENSIONS DR180, 240 & 300
(RAINHOOD). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
16 TYPICAL UNIT APPLICATIONS. . . . . . . . . . . . . . . . . . 56
17 FOUR AND SIX POINT LOADS . . . . . . . . . . . . . . . . . .57
18 UNIT ROOF CURB DIMENSIONS . . . . . . . . . . . . . . . . 58
19 ROOF CURB DUCT OPENINGS
DIMENSION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
20 CUT AWAY OF ROOF CURB. . . . . . . . . . . . . . . . . . . . 58
21 TYPICAL FIELD WIRING . . . . . . . . . . . . . . . . . . . . . . .59
LIST OF TABLES
Tbl. #
Pg. #
1 SOUND POWER RATING . . . . . . . . . . . . . . . . . . . . . . 21
2 CAPACITY RATINGS - (ARI 360) . . . . . . . . . . . . . . . . 21
3 GAS HEAT RATINGS. . . . . . . . . . . . . . . . . . . . . . . . . . 21
4 COOLING CAPACITY FOR DR180 . . . . . . . . . . . . . . . 22
5 COOLING CAPACITY FOR DR240 . . . . . . . . . . . . . . . 23
6 COOLING CAPACITY FOR DR300 . . . . . . . . . . . . . . . 24
7 COOLING CAPACITIES FOR DR180 AT 85°F
(ALTERNATE REHEAT MODE). . . . . . . . . . . . . . . . . . 25
8 COOLING CAPACITIES FOR DR180 AT 95°F
(ALTERNATE REHEAT MODE). . . . . . . . . . . . . . . . . . 25
9 COOLING CAPACITIES FOR DR180 AT 105°F
(ALTERNATE REHEAT MODE). . . . . . . . . . . . . . . . . . 26
10 COOLING CAPACITIES FOR DR180 AT 115°F
(ALTERNATE REHEAT MODE). . . . . . . . . . . . . . . . . . 26
11 COOLING CAPACITIES FOR DR180 AT 125°F
(ALTERNATE REHEAT MODE). . . . . . . . . . . . . . . . . . 27
12 COOLING CAPACITIES FOR DR240 AT 85°F
(ALTERNATE REHEAT MODE). . . . . . . . . . . . . . . . . . 28
13 COOLING CAPACITIES FOR DR240 AT 95°F
(ALTERNATE REHEAT MODE). . . . . . . . . . . . . . . . . . 28
14 COOLING CAPACITIES FOR DR240 AT 105°F
(ALTERNATE REHEAT MODE). . . . . . . . . . . . . . . . . . 29
15 COOLING CAPACITIES FOR DR240 AT 115°F
(ALTERNATE REHEAT MODE). . . . . . . . . . . . . . . . . . 29
16 COOLING CAPACITIES FOR DR300 AT 85°F
(ALTERNATE REHEAT MODE). . . . . . . . . . . . . . . . . . 30
17 COOLING CAPACITIES FOR DR300 AT 95°F
(ALTERNATE REHEAT MODE). . . . . . . . . . . . . . . . . . 30
18 ALTITUDE CORRECTION FACTORS . . . . . . . . . . . . . 34
19 DR180 BLOWER PERFORMANCE - 15 TON
STANDARD DRIVE (COOLING ONLY) . . . . . . . . . . . . 36
20 DR180 BLOWER PERFORMANCE - 15 TON HIGH
STATIC DRIVE (COOLING ONLY) . . . . . . . . . . . . . . . 37
21 DR180 BLOWER PERFORMANCE - 15 TON
STANDARD DRIVE (GAS HEAT). . . . . . . . . . . . . . . . . 38
22 DR180 BLOWER PERFORMANCE - 15 TON
HIGH STATIC DRIVE (GAS HEAT) . . . . . . . . . . . . . . . 39
23 DR240 BLOWER PERFORMANCE - 20 TON
STANDARD DRIVE (COOLING ONLY) . . . . . . . . . . . . 40
24 DR240 BLOWER PERFORMANCE - 20 TON
HIGH STATIC DRIVE (COOLING ONLY) . . . . . . . . . . 41
25 DR240 BLOWER PERFORMANCE - 20 TON
STANDARD DRIVE (GAS HEAT). . . . . . . . . . . . . . . . . 42
26 DR240 BLOWER PERFORMANCE - 20 TON
HIGH STATIC DRIVE (GAS HEAT) . . . . . . . . . . . . . . . 43