Trane CVHH - Bolt-Tightening Sequence for Waterboxes; Evaporator Waterbox Covers; Condenser Waterbox Covers; Heat Recovery Condenser Waterbox Covers

Waterbox Removal and Installation
CVHH-SVX001A-EN 101
Bolt-Tightening Sequence for
Waterboxes
Evaporator Waterbox Covers
Ensure that the waterbox head rests tightly against the
tube sheet, and then snugly tighten the bolts in sequential
order as shown in the figure below. If excessive tube sheet
crown prevents the head from contacting the tube sheet,
tighten the bolts located where the greatest gaps occur. Be
sure to use an equal number of bolt turns from side to side.
Then, apply final torque to each bolt in sequential order.
Condenser Waterbox Covers
Condenser waterbox covers use a similar procedure to
that which is used for the evaporator waterbox covers. Use
a crossing pattern as shown in the following figure.
Heat Recovery Condenser Waterbox
Covers
For heat recovery condenser waterbox covers, torque the
bolts along the center divider of the waterbox first (1A, 2A,
3A, etc), and then torque the bolts around the outside of
the waterbox (1B, 2B, 3B, etc).
1
24
5
9
20
2
23
3
4
22
6
7
8
10
19
18
26
25
17
21
16
15
14
13
12
11
1A
2A
3A
4A
5A
6A
7A
1B
5B
9B
13B
17B
21B
2B
6B
10B
14B
18B
22B
3B
7B
11B
15B
19B
23B
4B
8B
12B
16B
20B
24B