Rapid 2005, Installation, Operation & Service Manual

Page: 127 / 162

SECTION 19: S
TART
-
UP
P
ROCEDURES
117 of 147
Installation Code and Annual Inspections:
All installation and ser v ice of RAPID
®
eq u ipment
m u st be performed by a contractor q u alified in the
installation and ser v ice of eq u ipment sold and
s u pplied by Rapid Engineering LLC and conform to
all req u irements set forth in the RAPID ® man u als and
all applicable go v ernmental a u thorities pertaining to
the installation, ser v ice, labeling and operation of the
eq u ipment.
To help facilitate optim u m performance and safety,
Rapid Engineering LLC recommends that a q u alified
contractor cond u ct, at a minim u m, ann u al
inspections of yo u r RAPID ® eq u ipment and perform
ser v ice w here necessary, u sing only replacement
parts sold and s u pplied by Rapid Engineering LLC.
Check installation site to ens u re all codes and
engineering specifications are correct. This section of
the man
u al is intended to be u sed as an instr u ctional
g u ide to the commissioning of the direct fired air
handler. Fill o u t the start u p sheet located at the back
of the man u al as each step of the proced u re is
performed. This proced u re m u st be completed by the
commissioning contractor and ret u rned to Rapid
Engineering LLC. If the doc u ment is not ret u rned, the
man u fact u ring date w ill be u sed as the w arranty start
date.
All components ha
v e been checked at initial factory
start u p. D u ring transit components may ha v e
loosened/shifted, check all w iring before initial
start u p.
19.1 Installation of Recirculatin g Air Handler
E v ery direct-fired air handler w hich recirc u lates room
air (i.e., AM and FR styles) m u st u tilize either a
control system w hich limits temperat u re rise in
proportion to the amo u nt of o u tdoor air, or a room
carbon dioxide sensor, installed per the
man
u fact u rer’s recommendations. The normally-
closed contacts of this sensor m u st be w ired in as
per the CO
2
interlock diagram, maintaining the room
concentration of CO
2
belo w 5,000 ppm. Select the
CO
2
interlock diagram based on air handler
config u ration and model. See Page 97 , Figure 56
through Page 97, Figure 58 .
With the AM and VAV package, a temperat u re rise
limiting resistor comes pre w ired. See Page 90,
Figure 48 through Page 96, Figure 55 . When the air
handler goes into f u ll recirc u lation, the resistor is
acti v ated, lo w ering the maxim u m temperat u re rise to
comply w ith go v ernment standards. For the FR
package, the gas v al v e is preset to the proper
temperat u re rise. See Page 121, Table 24 .
19.2 Mechanical
This piece of eq u ipment req u ires at least 4 CFM
(6.8m 3 /h) of o u tside air per 1,000 Bt u /h (0.293 kW).
Before installation, check that the local distrib u tion
condition, nat u re of gas and press u re, and the
c u rrent state of adj u stment of the eq u ipment are
compatible.
If filters are not installed ( v ia inlet hood or filter
section), an air strainer m u st be installed on the inlet
of the air handler w ith openings less than or eq u al to
5/8" (16 mm) in diameter.
Air inlets m u st be installed w ith the lo w est edge 19"
(500 mm) abo v e any s u rface. This applies to roof
c u rbs, u pright stands and s u spended air handlers.
19.2.1 Sheave Ali g nment
Shea v es are factory aligned. On all air handlers,
check shea v e alignment as follo w s.
1. Attach a string to the v ertical s u rface next to
the blo w er shaft bearing. (
See Page 117, Figure
76 )
2. Wrap the string aro u nd the blo w er shea v e and
across both shea v e s u rfaces as sho w n.
3. Adj u st u ntil all fo u r contact points (triangle)
to u ch the shea v e s u rfaces. "IN" or "OUT"
adj u stment of the motor shea v e and/or motor
adj u stment may be req u ired.
4. P u ll the string a w ay from the motor shea v e and
then mo v e it slo w ly back to w ards the shea v e,
making s u re the string remains straight w hile
to u ching all contact points.
5. Remo v e string before t u rning air handler on.
FIGURE 76: Sheave Ali g nment
Correct Alignment
Incorrect Alignment