Spruce RB110 User manual

Page 1 of 7 IN018 Rev H
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Page 2 of 7 IN018 Rev H
Please Read And Save These Instructions.
WARNING - TO REDUCE THE RISK OF FIRE, ELECTRIC SHOCK, OR
INJURY TO PERSONS, OBSERVE THE FOLLOWING:
a) Installation work and electrical wiring must be done by qualified person(s) in accordance with all applicable
codes and standards, including fire-rated construction.
b) Sufficient air is needed for proper combustion and exhausting of gases through the flue (chimney) of fuel
burning equipment to prevent back drafting. Follow the heating equipment manufacturer’s guideline and safety
standards such as those published by the National Fire Protection Association (NFPA) and the American Society
for Heating, Refrigeration and Air Conditioning Engineers (ASHRAE) and the local code authorities.
c) When cutting or drilling into wall or ceiling, do not damage electrical wiring and other hidden utilities.
d) Ducted fans must always be vented to the outdoors.
e) If this unit is to be installed over a tub or shower, it must be marked as appropriate for the application and be
connected to a GFCI (Ground Fault Circuit Interrupter) - protected branch circuit.
f) NEVER place a switch where it can be reached from a tub or shower.
g) Use this unit only in the manner intended by the manufacturer. If you have any questions, contact the
manufacturer.
h) Before servicing or cleaning unit, switch power off at service panel and lock the service connecting means to
prevent power from being switched on accidentally. When the service disconnecting means cannot be locked,
securely fasten a prominent warning device, such as a tag, to the service panel.
i) Fan is suitable for use with solid-state speed controls.
CAUTION: For General Ventilating Use Only. Do Not Use To Exhaust
Hazardous Or Explosive Materials And Vapors.

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INSTALLATION INSTRUCTIONS IN018 Rev H
RB Series
RB110 P/N 23046-1, 28128
RB275 P/N 23034-1, 28115
RB300 P/N 23022-1, 28088
RB350 P/N 23023-1, 28261
RB400 P/N 23052-1, 28206
RB500 P/N 23053-1, 28207
1.0 Mounting
The Spruce RB Series fans may be mounted at any angle without affecting performance although the vertical
mounting position shown in Fig. 1 is highly recommended. If the vertical mounting position is not possible, care
should be taken to avoid creating a low spot in the fan/duct system where condensation might accumulate in the
fan housing as shown in Fig. 2. In situations where horizontal mounting is desired and condensation is likely to
occur (bathroom ventilation in cold climates) this problem might be avoided by mounting the fan 30 degrees
beyond horizontal as shown in Fig. 3.
2.0 Ducting
Any type of ducting is acceptable, however, flexible nonmetallic ducting is recommended for easy installation and
quieter operation. Insulated flexible ducting is highly recommended in cold climates to prevent the warm
bathroom air from forming condensation in the ducting where it is exposed to colder attic air. The outlet of the fan
should always be ducted to the outside. Avoid venting the outlet of the fan directly into an attic area. The excess
moisture from the bathroom can cause damage to building structure and any items stored in the attic. Multiple
venting points may be connected together using a "T" or "Y" fitting. Ideally Duct should be arranged such that
equal duct lengths are used between intake and "T" or "Y" fitting, this will result in equal flow rates in each intake
branch. If adjustable intake grilles are used on multi-intake systems then the opening on each grill should be equal
in order to minimise noise and resistance. Straight smooth runs of ducting will present the least resistance and
maximize system performance. Flexible ducting must always be as close to being fully extended as possible.
For quietest performance, the fan should be mounted further away from the inlet duct, near the outside vent. A
minimum distance of 10 feet is recommended between the fan or T/Y of a multi-intake system and intake grille(s).
3.0 Backdraft Dampers
Backdraft dampers allow airflow in only one direction preventing cold/hot drafts from entering the vented area and
minimize possible condensation and icing within the system while the fan is not operating. Backdraft dampers are
highly recommended at each intake grille for bathroom ventilation in all cold climate installations. Installation
instructions are included with Spruce back draft dampers.
4.0 Electrical Wiring
Electrical connection to the fan should be performed by a qualified person in accordance with all local, state and
national electrical codes. A Ground Fault Interrupter (GFI) circuit is not required in most installations, check your
local codes.
5.0 Applications
Suitable for general ventilation, bathroom venting, fresh air supply, duct boosting, building pressurization, etc.
The RB110 and RB350 are suitable for dryer boosting.
Not suitable for kitchen range hood venting.

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6.0 Installation
Step 1: Install Mounting Bracket as shown (RB110 & RB 275 Only,
separate instructions for RB400 & RB500 are included with Mounting
Bracket Kit). Insert Grommets into slots in mounting bracket. Orientate
the Electrical Box relative to Mounting Bracket as required. Attach the
fan to the mounting bracket with (3) #10 self-tapping screws, provided.
Avoid over tightening screws.
Step 2: Select location for fan mounting. A location 2/3 along the
ducting, a minimum of 10 feet away from the inlet vent to the fan or the
Y/T of a multi-intake system will provide the quietest operation. Fan
should be mounted vertically to prevent moisture from accumulating in
the fan housing. Attach bracket to mounting structure with the 1 1/4”
screws provided.
Step 3: Connect ductwork between fan inlet and area to be vented
through inlet grille. Flexible, nonmetallic ducting is recommended for
quietest operation and easiest installation. Insulated flexible ducting is
highly recommended for bathroom ventilation in all cold climate
installations. Metal worm drive clamps, spring clamps, adjustable
plastic ratchets are recommended for connection of ducting. Duct Tape
should be used to retain insulation.
Step 4: Connect inlet grille(s). An optional backdraft damper may be
installed in the inlet grille to prevent cold air from backing into the inlet
and also prevent condensation from forming inside the ductwork.
Backdraft dampers are highly recommended at each intake grille for
bathroom ventilation in all cold climate installations.
Step 5: Connect outlet of fan to outside vent. The outside vent may go
through the roof, sidewall or soffit as desired. Flexible, nonmetallic
ducting is recommended for quietest operation and easiest installation.
Insulated flexible ducting is highly recommended for bathroom
ventilation in all cold climate installations.
Step 6: Make electrical connection to fan.
Insure any metal fitting used in the installation is properly grounded. A
plastic cable connector such as a T&B #3300 may be used to avoid any
fitting-grounding problem. Observe the proper wiring connections:
RB Series Wire AC Connection
Black AC Line
White AC Common
Green or Grn/Yel Ground

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RB SERIES PRODUCT SPECIFICATIONS
The following chart shows fan performance for RB Series Commercial/Residential Fans:
Typical CFM Vs Static Pressure “WC
0” .2” .5” .75” 1.0” 1.25” 1.5” 1.75” 2.0”
RB110 135 100 68 10
RB275 275 230 176 140 103 70 20
RB300 320 270 211 172 135 90 30
RB350* 327 302 260 230 207 176 139 101 57
RB400 510 470 393 315 268 218 165 79 38
RB500 500 460 384 319 259 197 136 102 48
Power Consumption @ 120 VAC , 60Hz (2.0 Amp Maximum)
RB110 14 - 19 watts
RB275 50 - 75 watts
RB300 66 - 87 watts
RB350* 86 - 140 watts
RB400 95 - 152 watts
RB500 99 - 152 watts
Size:
*RB350 Not Energy Star Listed
Mounting: Mounting bracket included.
Recommended ducting: 4”, 6”, 8” or 10” Flexible Ducting.
Storage temperature range: 32 - 100 degrees F.
Normal operating temperature range: -20 - 120 degrees F.
Maximum inlet air temperature: 140 degrees F continuous.
Continuous Duty 3000 RPM
Thermally protected Class F Insulation
Rated for Indoor use only
Rated for Residential and Commercial use
Suitable for use with solid-state speed controls
Suitable for use over tub or shower
Fan Model “A” Dim “B” Dim “C” Dim Duct Size Weight
RB110 9.7” 3.9” 8.5” 4” 5 lbs
RB275 11.8” 5.9” 8.6” 6” 5.5 lbs
RB300 13.4” 5.9” 9” 6” 8 lbs
RB350* 13.4” 5.9” 9” 6” 8.5 lbs
RB400 13.4” 7.9” 10.5” 8” 11.5 lbs
RB500 13.4” 9.9” 10.5” 10” 11.5 lbs
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NOTE: RB350 IS NOT
HVI CERTIFIED

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