Greenheck Fan APEX-200 Drain Pan Traps, Variable Frequency Drive for Fans E7 Series by Yaskawa

Installation

Drain Pan Traps

Drain lines and traps should be run full size or larger from the drain pan connection (drain pan connection is 1.25-inch diameter female thread). Drain pans should have drain lines and traps to permit the condensate from the coils to drain freely. On all units with drain pans, the trap depth and the distance between the trap outlet and the drain pan outlet should be twice the static pressure in the drain pan section under normal operation to assure the trap remains sealed.

Electric Heater Application/Operation

6 in. min.

6 in. min.

FIGURE 11: Drain pan trap dimensions.

Factory installed electric post-heaters can be provided to warm the air leaving the energy recovery wheel to a user specified discharge temperature. Electric heaters are available in 208, 230, or 460 VAC (refer to heater nameplate for voltage).

Post-heaters are standard as 4-stage, step control. Step control heaters are designed with multiple stages made up of equal increments of heating capability. For example, an 80 kW heater with four stages will be composed of four 20-kW stages. Post-heaters come standard with a discharge temperature sensor (with

field adjustable set point). The four stages will come on one at a time until the discharge temperature set point is satisfied). Post-heaters are not single point wired (see Electrical Connections).

Post-heaters supplied with Greenheck temperature control package are 3-stage with binary control that provides 7 steps of heating. For example, a 35 kW heater with three stages will be composed of 5, 10, and 20 kW stages. The stages essentially ‘mix and match’ to provide heat output from 5 kW to 35 kW, in 5 kW increments.

Variable Frequency Drive for Fans (E7 Series by Yaskawa)

(see page 13 for VFD on energy recovery wheel)

Factory installed VFDs for the fans are programmed at the factory per the settings shown in TABLE 1 below (see FIGURE 12 for key pad). VFDs are shipped with a jumper between A1 to +V to allow the unit to turn on at full speed until the appropriate control signal can be applied. Remove the jumper when wiring the appropriate

.0-10 Vdc control signal. See FIGURE 13. Refer to the instruction manual that ships with the unit when making adjustments. A copy of the manual can be found online at www.drives.com. For technical support, contact Yaskawa direct at 1-800-927-5292.

	Parameters	Setting	Comment
A1-01	Access Level	2	Advanced Level
A1-04	Password	0	Leave as default
b1-01	(Frequency) Ref Source	1	Terminal - Analog Input A1
b1-02	Run (Command) Source	1	Contact Closure on S1
C1-01	Accl Time 1	30	Seconds
C1-02	Decel Time 2	30	Seconds
d2-01	Ref Upper Limit	100%	% of E1-04
d2-02	Ref Lower Limit	50%	% of E1-04
E1-04	Max Frequency	60 Hz	Ref for d2-01, d2-02, H3-03
E2-01	Motor Rated FLA	? A	Nameplate amps
H3-02	Terminal A1 Gain	100%	10V = 60 Hz, 100% of E1-04
H3-03	Terminal A1 Bias	50%	0V = 30 Hz, 50% of E1-04
L8-10	Cooling Fan Operation	0	Fan only during RUN
O2-03	User Defaults	1	Saves setting as user defaults
			Set defaults by A1-03 = 1110
A1-01	Access Level	0	Operation Only

TABLE 1: Factory settings for VFD used on fans

9

FIGURE 12: VFD key pad & LCD

FIGURE 13: Control signal to VFD

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