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0 commissioning and startup, 1 general, 2 checklist prior to startup – Reznor RECC Unit Installation Manual User Manual

Page 64: 0 optional equipment (cont'd)

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Form I-MAPSIII&IV, Page 64

Electric Heat Capacity and Sequence of Operation - Cabinet Sizes A, B, C

NOTE: 575V & 600V apply to RECB & RECC only.

Electric Heat Capacity Table

Size

240/480/600V

208V

230/460/575V

KW

MBH

KW

MBH

KW

MBH

10S

10

34.1

7.5

25.6

9.2

31.4

15S

15

51.2

11.3

38.4

13.8

47.1

20S

20

68.3

15.0

51.2

18.4

62.8

24S

24

82.0

18.0

61.5

22.1

75.4

15

15

51.2

11.3

38.4

13.8

47.1

20

20

68.3

15.0

51.2

18.4

62.8

25

25

85.4

18.8

64.0

23.0

78.5

30

30

102.5

22.5

76.8

27.6

94.3

35

35

119.5

26.3

89.6

32.2

110.0

39

39

133.2

29.3

99.9

35.9

122.5

60

60

204.9

45.0

153.7

55.2

188.5

75

75

256.1

56.3

192.1

69.0

235.6

88

88

300.5

66.0

225.4

81.0

276.5

Size

(kW) Size Cabinet

Electric Heaters Sequence of Operation
Stage

1

Stage

2

Stage 3

Stage 4

10

10S

A

10

-

-

-

15

15S

A

15

-

-

-

20

20S

A

20

-

-

-

24

24S

A

24

-

-

-

15

15

A or B

5

10

5 + 10

-

20

20

A or B

5

15

5 + 15

-

25

25

A or B

10

15

10 + 15

-

30

30

A or B

10

20

10 + 20

-

35

35

A or B

15

20

15 + 20

-

39

39

A, B, or C

15

24

15 + 24

-

50

50

B or C

10

10+10 10+10+15 10+10+15+15

60

60

B or C

10

10+10 10+10+20 10+10+20+20

75

75

B or C

15

15+20 15+20+20 15+20+20+20

88

88

B or C

20

20+20 20+20+24 20+20+24+24

9.0 Optional Equipment (cont'd)

9.3 lectric Heat - Models RECB, REDB, RECC, REDC (cont'd)

Modulating heating operation is controlled by an SCR modulating control. There will be

one or two SCR controllers located on an electrical panel in the electric heat section.

WARNING

The heatsink on the SCR power controller is hot to the touch.

FIGURE 47 - SCR

Controller for Electric

Heat Modulation

DANGER

High voltages are present on the terminals of the SCR power

controller(s).

9.3.2 Modulating Electric Heat

10.2 Checklist Prior

to Startup

Assumptions: All connections are made; actual startup is imminent. Site is clean; all

excess supplies, scraps, and debris have been removed. Clean filters are in place.

Doors are open for checks.

WARNING

To prevent injury or death due to electrocution or contact with

moving parts, lock disconnect switch open when doing checks

prior to startup.

NOTE: Redo cooling

startup procedures

when the cooling

season begins.

10.2.1 All Systems Checklist Prior to Startup:

Check clearances. All clearances must be as illustrated in Paragraph 4.1.

Verify the electrical supply matches voltage rating of the unit. (Refer to the rating

plate.)

10.1 General

Follow the procedures listed in Paragraphs 10.2 - 10.4 and fill in the Startup Form in

the

APPENDIX, page 70.

10.0 Commissioning and Startup