MTD 118-620A manuals

Mtd 118-620A User Manual (263 pages)

Brand: Mtd | Category: Lawnmowers | Size: 2.92 MB |

English

Table of contents

Applied Rooftop Units

1

Contents

2

Contents, Continued

3

Parts List Revision History

5

Nomenclature

10

Electrical Legend

16

C20= AE or AY and C19= YY

22

No Return Air Plenum

22

Damper Detail

23

0- 30% Outside Air Section

24

Units without Return Air Fans

25

Unit Sizes 015C- 030C only

26

Until 12/04

27

12/04 and later

27

Unit Sizes 036C- 040C only

28

0- 100% Economizer Assembly

29

C20= D*, E*, F*, G*

29

C19= BE- Assembly # 058400861

31

C21= 15F*

31

Unit Sizes 015- 030 only

31

Design Flow Detail

32

Code 20= FE, FY, GE, GY

32

Raceway

33

Base Channel

33

Return Air Fan Deck

36

12/04 & Later

38

Return Air Fan Motors

41

Return Air Opening

42

Return Air

42

Opening

42

Outdoor Air Intake Hood

44

Exhaust Hood

44

Economizer - C20=3E

46

24" Return Fan Detail

47

Fan Motors, Motor Mount

48

Fan Mounts

49

Economizer— C20= 3)

50

ACT3 or ACT4

50

Damper, Actuator (ACT12)

52

OAE, RAE, RAT, EAT, LAT

55

Heat Wheel

56

RA Opening

56

Unit Base

58

Assembly

58

C28= 4Z**** or 5Z****

62

Unit Sizes 036C and 040C Only

62

Section F- Supply Air Section

64

Option 1: Blank Compartment

97

Diffusers

97

Not Used

98

Steam Valve— C34= S***2E

99

Hot Water Valve— C34= W***3E

99

Option 3: Electric Heat

100

Code 04= E

100

Mounting Panel

102

Components

103

Components, Continued

105

Diagram & Components

108

Code 34= 020** or 025**

111

200 or 250 MBH Furnaces

111

Diagrams

113

Hi Turn Down Burner:

116

Hi Turn Down Burner

117

Until 1/01

120

9/08 & Later

123

(See Detail)

126

Gas Train- Inlet

127

Gas Train- Controls: GV2, GV3

129

Gas Train- Outlet

131

Gas Train- Damper Linkage

132

Single Stage Burners

132

C34= ****A*, ****P* or ****Q*

132

C34= ****E*, ****R* or ****S*

133

Until 8/03 (see note below)

134

Door Hardware and Gasketing

137

N/S= Not Shown on diagram

138

Evaporator Coils

140

C36= 5Z**** or 4Z****

140

Section Mounted Controls

141

C39= A, B, D or E

142

OAT, DAT, SD1

143

Damper Components

144

Doors, Gasketing and Hardware

145

Section M- Condenser Section

146

Control Box

189

Section N- Main Control Box

190

Refrigeration Tubing

261

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